Please remove the '?' from Graveyard levels and move the 'Treasure vault' levels to be AFTER the graveyard levels.
As someone who really, really enjoys graveyard levels, I want to be able to choose to do them, rather then having to luck into them. In addition, please make the treasure vault levels worthwhile to play. As it stands now, I groan everytime I hit one, as it seems to be a waste of energy. I could have gotten more crowns and heat on just about any other level. I don't really get the point of treasure levels as they currently are.
No, they should remain random. That's the point. On T3 with a full parties I dread graveyards and pray to the devil I won't get one, other times I want them. That's probably how you're intended to feel.
With you on the vaults, though. More treasure on those. We're supposed to feel lucky when we hit them, right?