ACTIONS
Attack / Cast spell (expands, sorted by spell levels, tabs for upcasting or metamagic) / Throw / Shove (expands to prone / push) / Disengage / Dodge / Hide / Ready / Dash / Help / Use class ability / Use item / Temporary actions e.g. Activate Witch Bolt
BONUS ACTIONS
Off-hand attack / Cast bonus action spell / Use ability / Use item
WEAPON SLOTS
A numbers of quick slots for equipment configurations you can switch in combat
CONSUMABLE ITEMS
Potion belt / Scroll case / Quiver for special ammo, each expand like inventory container
This sounds like a complete monstrosity to me.
You see, and that's why I believe (or want to believe, w / e) that Larian chosed a hotbar ...
Any actions that are not available can be greyed out so you can tell by glance if you have some action or bonus action still available.
Except for this!
And I would add that spells that do not have a popup menu (because so far our characters control only one level of the spell ... namely the second-level) should have a number written on the icon: II. in right down corner.
Again, to make it clear at a glance what this is all about.
