Here's something that I find annoying. In PRV, you can set default track height, and that's great. When you select a track, it's that height, and all others are (let's just say) minimised.
Sometimes you want to make just one more track a little bigger - but when you do this, *all the unselected* tracks get bigger too. It's a little hard to describe - but I like all tracks minimised except the one I'm working on. Sometimes though, I'd like a second one expanded a little (with the selected track). When you expand a second track - they all expand.
Does this make sense? In other words, sometimes I'd like all tracks minimised, but just one or two to be expanded. Having one expanded is easy, but having two or three expanded - with all the rest minimised - is not so easy.