What I hate is how every sort of consumable/throwable is automatically put into our ability bar.
I get the nice thought behind it, but in the end... it feels cramped.
Damn I wish there would be a dedicated group-slot indicating "all potions", "all throwables" and whatever else.
Definitely needs a cleaner UI.
A bag icon for all consumables.
A scroll case icon for all scrolls.
Separate spellcasting UI. The container style is an improvement over making all upcast spells their separate spell but it's still horrible. Now casting a spell at its base level requires two clicks.
And only what you want goes in the hotbar. Which could do with bigger icons at least on 1080p.