Add a wheel weight option to the FFB settings - I like to get a really good work out when driving. F12010 was awesome at 100% wheel weight until they patched it and reduced the effect
I find those tiny long straight corrections hard to get right without feeling some weight immediately (DFP)
Otherwise I agree with most of the suggestions above except for the 'buying pit crew' one. Let's not make it more complicated than it needs to be. Look at what happened to GT5! Someone will be suggesting 'free roam' next <sigh>
This incarnation of the game has turned out to be great. The first shift I have enjoyed well done SMS!
My most important wishlist would be...
Patchable?...
1) Wheel weight option.
2) Autoload existing saved setup for car/ circuit combination.
S3 probably...
3) in event practice, setup & qualifying
4) More options for quick race
5) custom champtionships