Dont get me wrong, I am sticking with bulls because I like them no matter how good they are, I've been using the minotaurs since fantasy days and I'll be damned if I take the little beasties instead of them now.
However with the wealth of -1 to hit penalties going around I feel the bulls should have at least been 3+ to hit, or there should have been a way to give it to them inside the BoC book. I played a game recently where my 6 man unit of great weapon bullgors charged Durthu , with +1 attack from gavespawn skill, +1 to wound and rerolls to wound from brass despoilers. He got his stomp off, and they absolutely bounced off of him, sure I rolled relatively poorly, but that was something that felt like it should have been a sure thing, specially on the turn they were basically blowing their load.
The spike potential of the bullgors is huge to be sure, but when compared to something like orruk brutes, who have huge damage potential as well , but are incredibly more consistent and yet somehow easier to procure buffs for, I get a little sad