I find it genuinely unplayable to play against kb 2 because u can't take any risk u just take one bad trade and u get one guy just flying at you like he has punch 2, atleast it should be harder to get it, it can cost just 6 levels if u optimize ur enchants well?
I think it should work like a flame/fire aspect, like "Allowed/Books only" with an additional option like you can enchant it up to kb 1
I agree sometimes it's cool to have kbs because people can't run excessively, but just flying at someone and drop him with kbs without any possibility of counterplay is way too frustrating especially considering how cheap it is