I'm of the same mindset, and I was expecting this game to have visual issues, but I didn't expect the framerate issues to be so noticeable. It wasn't as consistent as say New Little King's Story on Vita, but it was frequent enough for me to not consider it like a "GREAT game", but it's definitely worth playing.
I mentioned in my review how Zero's feet are basically always floating an inch above the ground, regardless of the environment. I also noticed some other weird things, like roots of trees that I could walk through, enemies that I flung away from a combo getting stuck in non-accessible parts of the field, and so on.
Thankfully the game considered them dead, so I could move onto the next area but if I had to restart due to them getting stuck, I would've lost my shit.