The wall jump in Super Metroid is weird and the grappling hook is awful. Fusion's story is fantastic but there are times where it's really easy to get stuck, much more than in Super. Also Fusion can really difficult at times, and not in a good way. Two times I remember:
The Nightmare boss is hard to begin with, but every time you die you have to spend a afew minutes running back to him because the save rooms don't work. It's awful.
I'm not sure if it would be possible to beat the final boss unless you use a particular strategy where you jump back and forth basically. Maybe if you had all energy tanks, but the game blocks you from going back to other areas when you are in the final area