No. It's a better game than GT5. But in my eyes, it still isn't what GT5 should have been in the first place. Updates won't change a thing if PD keeps adding things that do little to change the game.
Course maker (present in GT5), extended Photomode locations (GT5 and GT4), friendly cups with scalated levels of cars from 1 to 10 (GT4), choosing your own opponents in Arcade mode (including from your own garage, not present in any GT), qualifying, longer races, better AI that you actually race against instead of just breezing past them in an equal car, more tracks (much more important than 1200 cars most don't use). A better way to make money that didn't depend on logging 5 consecutive days to PSN and seasonal events which are one-time only.
That's what GT6 should have been, and what I expected originally from GT5.
EDIT: Endurance races as well. I didn't mention it because in GT4 you could easily jump into them, now it's harder to get to that point and I'm not too much of a fan of the career mode given that the AI sucks. 24 minutes of Le Mans, what a joke.
EDIT 2: The main problem I have with online lobbies is that it doesn't work as well as it would in Call of Duty: MW3, a game which I played to death. The reason is pretty simple: in CoD, all you do is shoot people in a map. In GT6, you race with different cars in a track you may not like very much, and while there were some maps in CoD I didn't like, at least it didn't make me quit the match. Plus you are expected to use the better guns which you gain when leveling up, but in GT6, I don't feel like driving the very fast cars it has to offer. It's a combination of finding the right tracks, the right car limitations, the right people... and it becomes difficult very quick, especially when the lobby has 2-5 persons in it.