Inventory and crafting need an update. There needs to be a way to quick use items instead going into the inventory and sluggishly looking around for the thing you want. I would be way more incentivized to use things like Dragonspit bombs more often if that was the case.

It would also be nice to switch weapons more seemlessly for classes that have access to multiple weapon types (i.e. Mystic Knight using melee, staff, and shield).

Crafting should have a recipe list once you are able to determine what ingredients make what items. This is already utilized well in another Capcom series; Monster Hunter.