Garage count? If you even play NFSU2, there's a limit to your Career garage (5 cars only) and even My Cars had a limit (10 cars).
Time transition? Again back to the Underground era games, do they even have any time transition? Yet no one complained about NFSU2, MW, Carbon, etc. about no time transition.
Touting customization? Oh so you would rather have the copy paste parts from NFSU? Because some of us don't considering that some individual parts in NFSU2 are ricey and people
complained about it being ricey. We're in the era where stance, big wings, front and rear fenders, diffusers, etc. are a thing now. As
@JakeMR2 said, Tokyo Drift is one example of a racing game that has a lot of variety in customization.
Bugs? Sure there are some bugs in the game but are they game breaking just like Rivals? From what I played (PS4 version) the bugs that I experienced is not even game breaking and did not even affected the whole game.
Post support? I would agree with that. I would suggest that Firemonkeys should take over post support considering that they're doing a great job with No Limits.
Always online? I would agree with that also.
One sided tuning? Once again please refer to your "touting customization" thing.
So the problems that you mentioned are problems that Ghost can even fix in the 2017 title. They learned their lesson from 2015 (in fact 2015 might just be a test to see if going back to the Underground theme might be better than the cops v racers theme.) and now they're gonna fix those for 2017.