Fair enough. I'm still mostly not using it, but I had a monk, and gave it a try, and it was awesome until I accidentally picked up a potion I didn't mean to and screwed up my inventory management/planning. A different button for attack vs pick up would probably be enough (though space is so convenient).
And as long as I'm blaming others for my stupid mistakes: how about disabling spacebar-to-purchase on potion shops?
Perhaps this is already part of the tab management you mentioned, but vis a vis the other discussion going on about learning the gods, perhaps it should switch to the piety tab any time your piety goes down?