That doesn't mean it has poor difficulty, and it is certainly not just a pure button-masher. As you get further into the game and fight bosses and go into demon trees (I forget what they're called in game), you will come to rely on certain special moves from your blades and specific attacking/dodging/blocking/canceling techniques to survive. You'll get owned real quick if you think you can get by just tapping attack buttons and blocking on even normal difficulty, not to mention hard, which has one-hit kills.
Even though there's a harder difficulty and special hard areas which are challenges, you may need to use a little bit of skill on those areas, but it still doesn't change the fact that you start right before the battle you died at, so you have to do nothing more than retry before you get it right. That alone kills the experience for me.
Also, I played hard difficulty. Enemies do more damage, but you don't die in one hit. I think. Maybe you do and I didn't notice. Anyways, I played until as the girl up to the third boss before I quit. I wouldn't rate this game very high at all. And the reason I quit was the absolute shitfest of a map design. The map itself doesn't point to where you need to go, only a direction on the top. But let's say you are on the correct layer, but on the wrong screen, going left will change say you have to go right, going right will say you have to go left, so the map doesn't even properly tell you where to go. After two times having to backtrack because of the shitty map design I was like fuck this bullshit, deleted the save data from the Vita and have no plans to ever attempt that game again.