If requests are being taken, the only 4 I would like to see would be:
1) Pace cars that change lanes
2) Variable speed pace cars, based on mapping of the throttle position around the track and averaged together, like SSDC does.
3) Ability to turn off and import sound files for various things (start of race, pit noises, lap being recorded, etc.)
4) Option for fuel burn based on throttle usage, not laps counted...have a heavier finger, burn fuel faster.
If those above items could be accomplished, I would think, for me, this would be the perfect RMS: Powerful, flexible, and a very simple and easy to use interface.