Ok, after reading and crossing out things before Admin pointed out that they were not within reasonable terms...
Working switches within 3D Virtual Cockpit
Better shuttle textures
Old shuttle avionics for older missions
Active Mid deck
Chase planes
MON2
External Tank inspection
Follow SRB until splashdown
Follow ET until disintegration
Enhanced MCC
LCC
Rollout
Multi-joystick setup
OBSS Inspection
VSync
However, he did mention some of us have mentioned the feature. Out of the above list, the features mentioned at least more than once are...
MON2
Follow SRB until splashdown
It could be any of those two, maybe...