Ideas and suggestions.

I suggest adding a new object to the super-dungeons: a tattoo and piercing parlor, where, for a fee (the amount is up to imagination), you can get a tattoo or piercing, thereby increasing the slots for the hero, specifically the ability to equip an additional item in the necklace, cloak, or ring slot of your choice. Additional perks upon elite status, a cloak upon renunciation, or a new 1-2 item, whatever it may be. And also +33 to spirit and luck, which is often very much needed in the late game (and sometimes boots as well, although rarely). It's just limiting to have only one when you have a full build in the late game.
Also, let's introduce the destruction of buildings in castles, as there was such a feature in some version, where castles would start to burn. I don't remember the nuances.