Very simple change, make it so that when u click on the timeline it doesnt overlay the screen rather the screen follows with it so the timeline doesnt cover the screen, i will pay monthly for this. Example: it sucks when i wanna watch my gameplay on league of legends and it covers my entire hud, half of the map which is like the prime reason why u want this timeline feature for.
If I understood currently, you can toggle OFF the auto hide option, and you'll get the timeline separated from the player in fullscreen mode.