I dug around and didn't see too much about this, so my apologies if this has come up elsewhere! My suggestion has to do with character customisation and equipment, specifically class starting equipment.
1. It would be really nice to be able to choose your starting equipment, even if it were just weapon and armour choices when creating a new character. Simple things like being able to start with a sword and shield instead of a two-handed sword, or chain mail instead of a chain shirt would make a lot of difference! Perhaps gold rolling could be incorporated at character creation like in the TTRPG could just be put in the game to prevent from min/maxing?
2. If the above was implemented, it would be nice to be able to choose how the weapon/armour looks. Colours/textures and racial styles would be a good idea to help give your character some... well... character. An elven rogue might have more ornately made daggers (though no more powerful) than a gnome might, for example.
3. Additional clothing to go with armour that would be aesthetic-only (i.e. no stats, just for flavour). The example I'd like to give here is my own TTRPG warlock who has a cloak he wears over the top of his leather armour. This would allow for players to give their characters a more unique style/a recognisable silhouette. I'm not sure whether simply creating more "styles" of armour to incorporate different aesthetic options like in suggestion 2 would work, e.g. a cloak over armour, or if aesthetic-only clothing would be better, e.g. a "cloak" slot for a cape, a "face" slot for a mask, etc. to avoid taking a "chest" or "head" slot where armour would go.
O do not run too fast, for I will but bespeak thy grave, and die.
