(I don't actually think she's OP) But she is a really, really good champion worth consideration in more than just zombies. I have a hunch that all the Broodcall dragons have a manual discount, so even though she's more expensive than what most FW players like to play, she still manages to be one of the most efficient ~85n champs you can play. I've been running her with rabid(1) and disease aura 3 in a deck with only mild disease synergy. Whenever she gets off a double-attack (not hard for a 7spd in FW) you're looking at 14+16+3+8=41 damage before defense/warbanner. Flying alone is worth a lot in this mapset, but she offers so much more raw, immediate damage that she should be getting a deeper look in a lot of decks.