Feature idea: When changing the framerate for roto'ing a newly added video, to have an auto switch back option to the original frame rate of the first imported video. Countless times I get caught out with changing the frame rate for a roto, then forget to change the frame rate back to the original video in the comp.
e.g.
Video 1 has a frame rate of 23.976
Video 2 is now imported to roto a head of a person. Frame rate is 29.97
To roto something in Video 2, it would be suggested to change the frame from 23.976 to 29.97. After the roto'ing is done, there's no reminder or auto switch back option to the frame rate of video 1 for the comp.