The suggestion I would like to put forth, is an extension to the saved build system. Imagine if you could swap builds in combat? the idea is being able to ‘Favourite’ up to three builds which can then be switched between in combat to allow for more abilities. Perhaps by keybinding them to the number pad? or Alt+1, 2, or 3 etc.
This could function similar to the old aegis system, putting abilities on a small lockout timer and not being able to switch builds when abilities are on CD to keep it balanced.
Would be a nice little feature to allow some more tactical play in PvE and the occasional PvP