Should be fairly simple. I use a laptop and so I have little height but lots of width on my screen. This can make using the timeline a pain (either it's too thin to see many channels, or I have to keep opening it and closing it)
I removed the workspace section from the toolbox and several other little used icons to save space, so I can have more space for the timeline, but it'd be much simpler if I could widen the toolbox and it have 5, 6 etc icons wide instead of just 4.