I'm a big ARAM fan and have been running in to a bit of an issue with the new runes. Often with rerolling and trading I'm only left with about 20 seconds (or less) to finish my runes. As of now, with not knowing what they all do, it's usually impossible for me to read/select the runes I want in time. I do think this will be _less_ of an issue with having multiple rune pages on the live server, but may still be enough to warrant looking at.
To note, I'm also on an older laptop so loading the rune selector is a bit sluggish for me, but probably only adds a few seconds overall.
TL;DR: I'd like to look at having more time for ARAM rune changes due to rerolls and trading taking up time.