The only reason I'm not looking forward to when the new Runes/Masteries update hits

Worth it. The zany theorycrafting that's going to come along with this is going to be really fun for me.

I still can't decide what runes to run on Swain. He could easily run any of about 3 or 4 different combinations, all of which would work well. I'm hoping that they're all nearly equally viable, in fact, because that would mean that runes could actually help you refine your own style instead of being this silly optimization mini-game!