To increase the longevity of the game I'd love to see the team/rider graphics kept up to date as they change from year to year.
This would be a great download, dare I even say one which is paid for..
Buying/playing the game during the year of purchase, when all the team colours are current is great, but once that season finishes, and the next one starts, it feels like a really old game when you're still riding in last years colours.
Not a biggie, just my two pence worth
Also, something which the guys designing Forza 3 seem to have got right is to slightly widen the cockpit view. I'd love to race from the cockpit of the bike, but it narrows your view too much making cornering really tricky, if the view was widened some it would make it so much easier.
And lastly, tire wear for a full race would be great.