Well, personally I am never against this idea, as long as there is actually a rule established about it.(Busiek style) And this power set will mostly serve her own character.
I actually would like the Busiek route and explain that before WV her basic power set is energy manipulation and indirect TK enabled by that. But someone or something granted her the power to do more.
(Like Chthon only ever unlock that part of her power in WV or something, I would kinda like the idea that Chthon is just experimenting in this case, observing what Wanda could do under extreme grief or something like that. Giving him some curiosity in humanity other than pure malicious intent.)