IMO, the bad things PD made in GT5, are "Gift option" and not enough events.
IMO, without the gift option, I would have played GT5 for a year at least, just to collect all cars, what took me 4 months.
At least, more events with higher career level would be fun, especially if there were cars as prizes after winning an event or completing a level, don't even think about seasonal events, that's nothing at all, 5 races per week ?! Is that big deal ?? Don't think so if you play at least 2hrs+ per day.
And the stupid 500.000 Cr for overhauling the engine and fixing chassis...come on ! At least if there was noway to grind and get enough money, nevermind...
Am I disappointed ? Hell yes I am, 5 years waiting and this is GT5...Happy with the physics, amazed with photomode quality, also the high detailed tracks and premium cars, but that's not everything...
Today I don't play GT5 anymore, left it at level 40 A&B Spec, 100% game progress, own all cars and 20.000.000 Cr. What left ? Online ? Yes , maybe, if I get bored of the other games...But, I'm having fun - without GT5 - and that's what I want.