After Playing Doomsday Dawn, I'm annoyed how indispensable clerics are. The healing other classes can offer up doesn't come close, and feat based healing has the disadvantage of extremely high checks.
Of course this is made worse by the gulf in accuracy between PCs and NPCs at the moment.
They really need to tweak the math in this game: Rest recovery tied to Con means damage sticks across days, High DCs on feat based healing means low chance of success, and High fragility of PCs makes combat both dangerous and a chore.