I went for a sidestep since I wanted to do a side throw lol. It looked pretty funny seeing Mitsu's sword hit air but the dmg landed on me. Oh ZWHY.....
Well you have to use it differently than it is intended to be. B+K is used as if you were fishing for a fuck up. Same with 1(B), you don't just run to their faces and do 1(B) you back away and use it in order to fish for a bitch slap from Ein
I remember when I first started using Zwei, I overused 1(B) and Ezio shot me in the face with a crossbow (>Y_Y)
B+K is useful against certain situations like when Raph is doing prep. It's good for interruption lol. But I also tend to freak out when chars are in my face and I feel like I have to throw out B+K or (B).