I must also complain that now when I am forced to use multiple hotbars per character, I found that shortcuts to switching between hotbars don't work, and one is forced to click and misclick those tiny arrows at the side.

By default the buttons assigned are: "R" and "F". Those are also in conflict as other other functions are bound to those (at least R is). I made it so only "next/previous Hotbar" are assigned to those keys - nothing happened. Then I remap them to completely different buttons. Still no success. Comeon Larian - playabilty is somewhat important.