I'm sorry you encountered some rudeness. I personally would like more hot bars as well, but my game can't handle 5 hot bars as it is. It refuses to recognize my input if I try to swap weapons while moving, for example-- meaning that if I'm trying to weaken an enemy with ichor while backpedaling and I want to switch to my Night's Edge, My character will actually stop and stand in the middle or the screen, sponging damage for 5 seconds while ignoring my input. Then, instead of trying to move, I have to select my weapon AND THEN move, at which point I either lost my ichor effect/time of buffs/rebuffs, most of/some of my health or am dead.
I'd like to see them fix THAT before adding any more hot bars.