UI: - right-click interaction with portraits, like opening char sheet or inventory. - option to sele select whole party for simulatnous stealth, jumping, attacking the same target, etc. - make characters position when not on screen more visible (edge indicators).
Rules: - 5E has the option for group afforts. let the whole group roll as a team on stuff like breaking down doors, etc. - better class implementation: who gehts to learn what spells; treat familiars as enteties, not spell effects that go away on rest, etc.
Presentation - character models need more love: let us equip backpacks, cloaks, quivers, etc. and make weapons appear as they should. - customize armor appearance - mutliple models for the same type armor.
Misc. - more different difficulties. everything up to true pnp mode, complete with hunger, thirst and fatigue mechanics.