I agree with you in regard to the Scarlet Witch solo. The core idea of her development and independence could only be gained through... well.
I stopped reading it after awhile, because in the end I decided the whole thing was ok'ed in the first place to both further sell the retcon and divide Wanda and Pietro with Fox now the only one using Pietro.
In the end I think the series suffered and died a very premature death because in effect it was ordered in no small part with the goal of trying to make very unpopular directives popular.