For now it will be only mods which should be in game officially ;
Host your own game
Notice Key Pickup
Player List Plus
Also like for me Darktide should have such features to to make menus more comftable to use.
Some things which I like to be changed/add;
*Fire it is so blindingly bright especialy when Sienna player cast abilities and fire is all over the place.
*Bretonian Sword&Shiled here I see only one thing to change; remove shield push from atack patern.
For now it all what comes to my mind.