Tbh Gran Turismo with a good online component I'm all over.
The GT single player experience has never been much, the AI is poor at best, most races just a 'start last and try and catch everyone before the end' kind of deal with the difficulty scripted based on how far you start behind or what cars the AI begins with. Not like the single player in this is any different is it?
GT single player has never been about decent race strategy or anything like that. Even on the most recent games where you have the Championship series with points per race, the AI qualifies in the same order every race, finishes in the same order every race with the only difference being where the player finishes.
Don't get me wrong, I love GT, but the GT Sport single player isn't all that different to what GT has always had.