I'd also like to say that it would be nice for players who are trying to take the "Good" route and refuse her deal, they should be able to ask her corpse about the +1 bonus and it just be that instead of Ethel ripping her scalp out, it's the player scalping the corpse. Regarding this though, if players are able to kill Ethel before she retreats to her lair, then I think they should be locked out of this option since the deal was never brought up. (And I say this as someone who did take the witch out through the proper application of explosives.)