I know this is picky: speedy leaf still has an indicator showing that it costs 0 energy to use when you hover over it, but since the update you can no longer manually use it.
Also I would like an option to speed the game play up by removing the animations and delays between items activating. If a weapon applies lots of effects it can seem like an eternity before you can use something again. Especially in cleaver builds w/ cleansing flame, bag of knives etc.