Same again, but why would you change a good thing?
There are 4 story modes to play through, each with about 14 levels each, so its not as long as the other games (in which there were about 25 characters with 7 levels in each musou), but at least every battle ive played so far is different.
The best aditions have to be the RB special attack that makes battles so much cooler, and the fact that you can have 3 characters. the only downside to multiple charactes is that they heal when switched out, and therfore on lower difficulties you are never thretened and on higher ones you can do no damage. I understand the reason this game got an official "5.0", but thats for mainstream. i think for fans this game deserves something around an "8.5".
(Id advise not getting this game with the intentions of getting something new, if you want that then wait for bladestorm, but if you like the old hacknslash then get it)