as kev said, front and rear supension and downforce would be great, as would feedback to help balence the car, with each driver prefering different setups per race.
also, when changing the supension etc it would be helpful to have some sort of number next to the sliding bars to indicate excatly what you have it set to as when i got 1 car perfect i then set up the other cars supension etc the same but would of been much quicker if there was some numerical information insted of just a bar.
the highlights speed bar isnt as responsive as it could be either, and it would be helpful to have the team names next to the driver names on the lap time section.
also, some sort of driver aggression could work quite well, with the leader with a 10 second gap and 5 laps left driviong very defensivly to avoid going off, and if someone is right behind another driver, tellking him to go aggressive could cause a crash or overtaking etc.
also will you be able to do things like sell advertising, sign different drivers, change engine supplyers at the end of the season etc
EDIT:
just found a bug glenn, during the race i decided to change my pit stop stratagy and bring in a driver 1 lap earlyer and put in 1 lap less fuel whe hes in to get a quicker pit stop as it was a close race, but when i pressed comfirm settings it crashed, tryed again and it did the same thing.
also, no cars crashed/spun off/failed to finish up to now and there has been far too much overtaking, it seems to be totally based on times and doesnt take into account difficulty of overtaking, I understand that the game is still in its early stages and presume the overtaking and crashing etc will be added in due time, as well as probably a mountin of other features if your work on cricket coach is anything to go by
