Yep, more if not all have been requested.
Directional Controls: I would not go with a swivel plate, that could cause a lot of stress on the bike, some kind of hand control/joystick would be better.
Aero Sensor : Something like this would be cool: http://www.aerobaredge.com/
Export Power Device type to Strava : Good suggestion and should not be too hard, but Strava I would think would also need to be involved in implementing it.
Better Group Rides / Meetup functionality and Private servers: Been suggested and I think change is coming soon
Community Map development : Don’t think Zwift is going to let this happen any time soon, they would lose quality control and their platform is proprietary (built in house)
More Bikes + Community Development bikes even just skins : More bike are coming. Customization of Zwift build bikes could be possible, but I am not sure bike manufactures would allow changes to theirs, and this includes colors.
Deeper bike customization : Tires could be helpful with in-game speed and/or handling, other options would not give much, if any in-game performance so not sure if that would be worth Zwift’s time. Maybe different helmets for TT would be cool.
Get rid of rainy environment: If different tires are implemented having rain could make racing interesting if it could effect traction and or handling.