Pathfinder has a good solution even if it's not very well done IMO (but it's an impossible job with so much classes and types of powers)
About BG3 a single hotbar combined with "a button" to open your spellbook, a button to open your actions, a button to open your bonus action, a button for your consummables should be okay.
A button that is not clickable if you do not have (re)(bonus) actions anymore or something that show you how much type of everything you can use like in Solasta.
Pathfinder's UI combined with the best of Solasta's one.
Last edited by Maximuuus; 07/09/21 05:33 AM.