Would be great if some of the following points is added to the game:
The bug of mine collapse, that makes you take more dirt than normal (60-90-180 of dirt for each removed ground level)
Flammable tar, animal fat or maybe wooden spikes filling our castle's pits, it will avoid tries of glitching through our walls. Also a giant pot filled with hot oil for throwing over the wall.
Metallic ammo for sling, a real morning star (a mace with chain) or an automatic hit when someone go inside of our wall of pikes (if someone is thrown against the wall of pikes I do not need to hit him, just keep the line should be enough, then things like speed, constitution or strength could work to know if the charge has succes or not)
Inside of art skill tree (and depending on our level of alignment [evil and good]) we could have things like beautifull paints, statues or heads on a pike, also would be cool if we can customize worksuits and beginning rags, changing colour or style, but we should get coloured ink from somewhere.
Maybe a cloak that hide our name while we are wearing it, usefull for traitors, spy or just get unnoticed.
just some ideas that I think can make the game a bit better for all of us.