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 ...