Tell me, how do you define a full game? Because to me, GT Sport was a full game. It just wasn't the experience everyone wanted, which is fine because it wasn't the experience I fully wanted either.
A full game would have a decent amount of cars for each brand. Lots are missing. And of course I'm seeing what other franchises are bringing. GT isn't the only racing game out there. Other franchises are bring cars that PEOPLE asked for. Historical, well performing, new and exciting cars.
A full game would have body customization and tuning parts, not some points that you would use to increase the performance of a car, especially since we're talking about a feature that should simulate real life tunig. In GTS everything is based on BoP and tuninig is all about moving some slides and no choice of brakes, mufflers, air filters, mcu etc etc.
A full game would have a huge variety of events online to choose from. GTS only has 3 per week and the tracks/cars combos are always almost repetitive. Not all tracks are being used.
A full game would have a well planned multiplayer mode. I'm sorry but I feel that everything outside of Daily Races is just unpractical, a slow to navigate mess. People enter lobbies -> nothing happens -> people leave lobbies.
A full game wouldn't have a broken economy system that don't even allow you to reach 20 mil credits. (I do have a life. I'm at 15 mil after saving for almost 5 months)
A full game wouldn't have a broken penalty system either.
A full game would have a decent career mode. Not just some unrelated events thrown here and there just because they have to give us something.
A full game would have a good variety of rally stages and a thought system that really makes you want to use it (I can't remember the last time I touched that rally mode. Doesn't feel real, especially with all the invisible/unbreakable (laughable, I must add) walls.
A full game wouldn't award you countless duplicates that stay in your garage with no purpose. Ca't even resell them.
Just to give a few examples. I'm tired tonight. I'm pretty sure there are a lot of other things to talk about on why GTS isn't full.