Spoken like a true pessimist, I'd say. Only focusing on cons and not seeing the entire picture.
I think we could objectively destroy all the reputation PD gained with GT1 to 4 (I'd say GT3 but this is not the point) just analyzing GT5 and 6.
Except that most of your points are subjective, i.e.: not based on facts, but purely on your opinion. So, not really. Some points are valid, but most are...questionable. Let me explain why.
-perfectionism? games are buggy and unfinished
-artistic approach? where is the GT singularity in terms of design ? You really need to play other games to see what an artistic approach is.
-vision? Kaz vision is still to be found... most uninspired game design in the AAA industry, by far.... just look at the online mode, GT mode, etc...
This bit is totally irrelevant. I (we?) as customers don't care about this; I only care about the end product. The part I agree on though: 'game is buggy and unfinished'. Well duh, but the game would still not be released if all of the bugs and features were in there. Fix the bugs, asap, of course! But is the game junk because of bugs? No.
-realism ? unrealistic top speeds (again), unrealistic ABS, unrealistic electronic devices on old cars, unrealistic tyre wear, unrealistic sounds, no torque steering at all, etc...
Agreed on this, mostly.
Although:
- ABS: fine by me..ABS off = risk of locking and introduces a need of brake modulation, while ABS on = no risk of locking. Who cares that it doesn't exactly work like real-life when it approximates it well enough?
- Torque steering is modeled as a function of uneven geometry of the suspension due to track slopes or steering angle. Good enough for me, since I don't consider this a core part of the driving physics (you know, driving/drifting at speed..).
But what about the excellent suspension dynamics, weight transfer and FFB effects, i.e. the core driving physics that are within certain boundaries nothing less than very impressive under normal conditions (driving at speed within certain extremes), nonetheless due to the fact that it is built from the ground up based on a variety of measured data and truly simulates real-life by inputting independent vehicle parameters? If you even have the slightest scope of what kind of science is involved in this and how stuff works under the hood, then you'd better understand why the flaws exist and why that's not a valid reason at all to complain, because every single (driving) game out there has the same problems, just shuffled the 'incorrect' simulation results to aspects that the developer deems less important (hint: fit models and inherent margins of errors and exceptional situations that create situations in which the model produces unreliable results). With some of the knowledge and a neutral mind towards this (instead of focusing on the negative aspects only like you do now), you might even appreciate what kind of great (imo) physics engine GT6 offers.
-scale? GT does nothing more than its competitors in terms of gaming design: actually way less... and more boring
No idea what you're saying here, nor how it is relevant at all. Scale for me is excellent: lots of cars and lots of tracks. A physics engine that is good enough for most of the time. No game that offers this combination for me. The comparison with competitors (which you don't even elaborate on)...irrelevant for me as an end-customer.
-encyclopedia of cars? how can you pretend to build an encyclpedia of cars when you lack so many masterpieces and insert so many crappy cars? On the TOP5 fastest cars in the world NONE is in GT6: no Mac laren P1, no Laferrari, No 918 Spyder, No Koenigsegg, No Hennessy Venom,.... we were expecting new cars synchronized to new car presentations...but I guess this is way too easy fot Kaz vision...
This is what I mean about being subjective. It is your opinion and that's fine. I for myself couldn't care less about individual car models; it's about the entire car list. Sure, it's a shame, but there is no game that offers all of these cars, so what's the point? All I care about is buying the best 'compromise' in terms of a driving game...GT6 offers plenty of supercars. If you want true objectivity: just compare the _absolute_ amount of supercars to any other game and there you have it.
-technical achievements? VERY inconsistent. The framerate is all over the place, which is a crime as it really ruins all the efforts in terms of immersion. The framerate was really bad in GT5 (as soon as you got the engine under any stress)...but GT6 does unbelievably worse. hardly playable sometimes if you are framerate sensitive. IQ ingame is terrible... and those graphic "prowesses" come at a cost: sounds design is the worst of any recent car game. Tyre screeches are almost unbearable and engine sounds are laughable (some are average at best... still far from the best sims out there). PD can throw as much adaptative tesselation they want (what was it supposed to add to our game experience btw? Why even tell us about it when the result is so not beneficial to the players), the end result, technically speaking, is VERY mitigated, to say the least.
Correct on the framerate being not superb (only when there is a lot going on on-screen; most of the time it is > 40 fps (see Digital Foundry)). Is it a 'crime'? No, of course not. This is your lack of objectivity playing part again. If it was unplayable, then I wouldn't be playing this game, as simple as that. But I still am and still have fun.
Engine sounds are among the worst, agreed. Tyre screeches however are a bit too loud for my taste, but the samples themselves are rather realistic. Plenty of car videos on the web to know how those should sound like (Nürb onboard laps to compare comfort tyres to, for instance).
BUT, they could do all this and still try to get close to their community, try to open up and chill out a bit. No. Their communication is a disaster...Not only did they concieve their online mode like 10 years ago...but they also conceive their PR like 15 years ago. They did not understand what internet changed in terms of gaming...and in terms of PR. If there is a PR department at PD (and I honestly doubt it), they do the worst job ever.
And the release of Kaz documentary (an ode to the genius) exactly when the community's frustration grows dangerously... OMG: this is the worst move ever. I can't even believe Sony produced a documentary to praise one of their bosses. This is a very disturbing kind of autosatisfaction. And the release timing is pure genius.
The lack of communication is bad, agreed. Hence this thread, right?
Another irrelevant point you throw in though: the documentary. For your information: it was not done by Sony, but by some independent film maker. But then again, who cares? I only care about the game and there's no relation whatsoever between a movie about the creator of the game and the quality of the game itself.
This is where we are now. GT is just an empty shell, only relying on previous iterations to sell. Time for change.
Something that is entirely not objective and only your opinion: 'GT is just an empty shell'. I agree that some things need to be changed, but the situation is not even nearly as closely as bad as you try to make it look like. I'm 13.800 km of driving in and am still having lots of fun trying out new cars, driving them at the limit and just cruise along with my internet friends when I'm out of concentration. There would be none of that pleasure when there was no GT6, so I'm very grateful to be able to experience this... 'empty shell'.
I see what you did there... 
