Good thing she isn't an X-character.
Except she has long evolved beyond just a mere mutant, since like 70s, are you really suggesting ditching her own lore and stories in favor of "making her part of X-franchise again"? This actually sounds like character theft.
Again, she is not an X-character, unless by stealing you mean in the bloody 60s.
Wanda is popular thanks to her presnece in the MCU and that is due to her materials in Avengers comics.
She mostly contribute as a plot device.