Ammm.....my point was - in Arena you CAN"T use any still -it's all on auto. And ye - I got Neji, Iruka, Guy, Ao (Hinata even) - they can cancel skills. But they cancel the firs skill that opposite team uses - so it depends of other player line ups. For example other player have Hinata and Gaara in different parties. They both begin to cast skills, but Hinata's initiative is a bit higher, so she cast first, so my Neji stops her instead of Gaara.... Hope you get my point
.....so it's not smooth, good sir.