Butcher's block shouldn't generate 20 gauge, it's already the enmity and highest potency combo. Right now you need to weigh the benefit of the extra potency against the extra gauge generated by path combo, which can be used for onslaught (like it or not it's ogcd so you can use it for extra dps when upheaval is on cd).

I do agree that the stance switch penalty makes the class clunky. Being able to use lv 60 accessories is just a stupid oversight on the dev's part, it'll probably be patched soon.