The basic Page 1,2,3,4-x isn't satisfying enough.
I think it would be a great little tweak to just add the ability to be able to name the pages, I often get mixed up with my rune pages and I'm sure many others do as well.

but we can rename them! just click the pen icon next to the mastery page name!

you mean something like this
http://na.leagueoflegends.com/board/....php?t=2985318

ahhh i see what you're getting at. Not really liking the idea of editing the headers for the pages but i would like to see a reorder feature for mastery and rune pages!