Both shops and levers are in short supply on my latest game. Went down to floor 5 before quitting in annoyance, and none of the lower 3 levels had shops. None of the lower 4 had levers (except teleporting and other room-relevant ones). The ones for spawning traps, opening UCs and showing hidden rooms simply aren't there. Makes RotDG a bit of a dealbreaker for me, since opening UCs and selling lots of loot are my favourite activities