What I find the worst so far is just the way the map layout is. Particularly the fact that even with the double jump, climb, hover and grappling hook it still feels impossible to directly get somewhere without going the only way they want you to. There are so many cliffs that I wish I could climb or grapple my way up but no I have to drive around the entire hill until I get to the entrance where the main road connects because that's how they want me to do it.
This works better with the smaller maps from the earlier games but here it just sucks (not to mention the large map is causing most of the performance lag). But even if you do find a way to climb up somewhere, there are so..SO many invisible walls in this game. HUGE ones. I just found one that blocks you from jumping into a large arena because they want you to walk though small front door instead. So that's what I feel this game is. Everything is pretty bad but once you get to the combat, that's still satisfying and fun.