I loved rogue, but when I became Ninja, it ruined it for me. I can't stand the weaving of abilities setups to perform the ability. It's a nightmare for me, and I end up messing it up most of the time. I ended up giving up on Ninja, and went Samurai, and I don't miss Ninja at all.
If they took those silly combo power ups out of Ninja and gave it straight usable abilities instead, I would switch back.