1. Ability to use mount's run skill (when available) by double-tapping W (forward)
2. Ability to open glider while falling by pressing space bar, which would help avoiding pointless deaths when you judge wrongly slope of the terrain and fall to your doom.
3. Ability to upgrade gear while on a mount. This restriction always felt really arbitrary to me.
4. Normal logout timer if you happen to leave your boat (or other mount) somewhere. Having it at 10 MINUTES is downright asinine, especially when you have to hand over the computer to a family member and you left your boat/mount on the other side of the world.