The problem is, the majority of people are just going to hear about how broken it was when the game launched but having said that, I'm in agreement with you. Now its fully working, complete with weather and the other minor alterations they made to the game this really is a cracking racing game. There is no way its "now" worth its average score on a Website like Gamerankings (Currently 70%). Its considerably better than that.
It's now just as good if not better than the PGR series (which I think Driveclub most relates to in terms of content and the way it plays).
But, I suppose the developers only have themselves to blame if the low score impacts sales on a whole over a period of time. Simple answer, get it right out of the gate.
PREDICTIONS FOR END OF 2015: (Made Jan 1st 2015)
PS4 - 34M - XB1 - 21m - WII U -12M
