I have a feature suggestion:
The ability to "burn in" external .srt and .aas subtitles in the rendered video.
Normally the .srt or .aas file must have the same name and be in the same folder as the video file to be viewed on the player.
This feature permanently burns the subtitles in the video file and it is no longer necessary to have the .srt or .aas file in order to view the subtitles.
In Premiere and Vegas this feature it can be used to burn the external caption directly in the timeline project during rendering.
So far Handbrake is one of the only software I know of that can do that.