It could do with a more fluid combat system. Nintendo have an obsession with lock-on targeting systems which oversimplify the combat to the point that you don't really feel any gratification for conquering an enemy. I'd love it if they went full on Dark Souls where combat is all about timing, dodging, and weapon/magic choice. Zelda is a bit like that but there is only ever one way to fight something and as soon as you're locked on, you're essentially trapped in a virtual box and the environment doesn't really come into play. With Dark Souls you have to engage pretty much every faculty in your approach, and do it with speed. Plus, the feedback you get from connecting with a halberd or some such is weighty as fuck and precipitates many a fist-pump.
There are some open world things that I cba to expound on right naww.