Why is this not already a thing?? I've yet to have a pvp encounter while having the wrong deck on(or at all really), but it would sure bum me out a lot if this happened and I had no way to change it to what I needed at that moment. I see one of two ways this could be done, either by switching out the moves you use from the first deck to the second, or initiating another small cooldown and changing the entire deck at once. I'm more inclined towards the 2nd option, since that prevents any sort of 'deck mixing', and also kind of treats deck changing as a move in itself. Only 1 change per fight, though, I feel nefarious botting would surely exploit this if you could continuously change your decks.
also, please make renaming combat schools available by default. Currently, only some of the custom clients offer this, and I don't really want to switch over to them and learn a bunch of new hotkeys n shit for such a minor, albeit helpful, feature.