Originally a EQ2, WoW, SWTOR player. They had a lot of hotkeys, wayyy too many in EQ2.
So I came up with the idea, in this game each hotbar should have 2 slots for passive abilities that grant their buffs. IE camouflaged hunter, inner light etc.
Since most of the abilities that grant passive buffs are usually very rarely used, it could simply be added to a different button combo.
RB+Y (or R1+triangle)
RB+B (or R1+circle)
Just a random thought, I know it will never happen. Wishful thinking haha!