Allow the timeline V and A tracks to act as one unit and scroll/zoom together
This would function so that the video and audio tracks act as if they are both in the same pane - with a visible line separating the V and A sections that moves as we scroll up/down. I think it would simplify scrolling and zooming up/down to see all the tracks, and would prevent having to reposition the separator when needing to increase the video/audio section when switching between doing something on either audio or video.
At the least, increase the visibility of the line that separates audio and video, as it's almost impossible to quickly see the distinction between the V and A sides of the timeline.
This is really hard to explain so please comment if you need some clarification :)