I find I export a video, then need to reexport the full clip again after a small client amend. I think being able to overwrite a section and rewarp the footage would be a great feature.

I find using tiffs sequences works for this as i can amend smaller sections till everything is correct then re import them all as one clip. I dont want to export a full video every time as some projects take a long time to export.

Surely this feature can be done with raw quicktime files.
h264 would be a dream but i imagine that it cant be done with this type of codec.