True, every game does. Even my favorite game ever (Vagrant Story) has a slight issue. But the issues this game has are huge.
Not really, no. You can't win prize cars repeteadly. We have this horrible money system that relies on grinding, along with the stupid level system, stupid paint system, and well, I could go on.
The only things I see GT5 being a step forward compared to GT4, are (you guessed it) the simulation aspects. As a game, it fails pretty hard. It could have been much better, but even simple things in concept (not sure how it would apply in practice) such as a paint system where you can paint your car whatever color you want, were not implemented. You could even choose to paint the car in colours you acquired previously by buying cars, like in GT5, to add more variety.
Not in my case. I actually enjoyed GT4 a thousand times more when I played for the first time, than when I played GT5 for the first time. Not to mention I played GT4 daily since I first got it, until I got bored around a year ago. GT5, on the other hand, is starting to bore me already, after only two weeks.
So, if I mean it, then others mean it as well.
Don't get me wrong. As a simulator, I'm pleased. I couldn't have expected more. Spinning out while driving a Lotus Elise is something that would have never happened to me in GT4. Frustrating, but feels good. But as a game, I really expected a general step forward. As it stands, the only gameplay feature I like is the paint system. It may not be perfect, but it's the best we have.
For now.