Why do you need so many panes? It sounds like you should be setting up a few more view schemes with fewer panes (typically mine VS use about 3 panes). I have about 10 view schemes then another 10 or so special ones for tagging.
The panes allow super quick and flexible filtering, they are setup as:
Genre, Artist, Album Artist, Album, Mood, Preference Situation, Tempo
... as an old MMJB user you can probably recognize those last 4 tags. I had been using MMJB for over 3yrs before switching over to MC, and I did like those custom tagging options and so have kept using them (and have added a few tag keywords of my own which is great to be able to do).
So that lets me quickly select something like:
Genre = House
Mood = Upbeat
Preference = Fantastic
Tempo = Fast
... and then also quickly repick a different item like Mood = Mellow. With over 5000 tracks it makes it a lot easier to make quick combinations/selections. I guess views could also do it for the often-used combinations, but the panes are working out supremely.
Incidentally, I really thank JRiver for adding the MMJB tag support into MC, I had asked for it many times and they delivered early during MC9 development/beta.