If it is possible, Parson's reaction ought to be interesting (when it was a question of normal uncroaking, "I wouldn't do that to her even if Wanda was okay to cast").
I think the point was that casters lose their 'caster' status if they are uncroaked. She would just be 1 more unit of basic infantry.
And mindless basic infantry, too.
He did ask if it was possible to uncroak, suggesting that he wanted to at least try.
Yes. Decrypting turns into a different and altogether frightening temptation if it seems like a way to get lost friends back. I wonder if there is a monkey's paw clause hidden somewhere in it...