Exactly true. I may be amongst the oldest here; 65, and I've been reading comics since the mid to late '60s. Wanda was nearly always the character that drew my attention in the beginning (perhaps my own Witchy background?) but by the time Magneto came to the Avengers and took them back (pre knowing their origin, around # 48 or so) I was totally entralled with Dame Wanda. Most of my love for her comes from the other stories in the Avengers and certainly not the mutant related ones.
While I originally loved the Byrne reveal, it has been so retconned now it is nearly useless. My head canon still says some mutant DNA could be involved in H.E.'s experiments, but I think it is a done deal and I think Wanda is better for it.
I still have reservations about how mutants, X-men, and Pietro, will be folded into the MCU, considering the twining. But we'll see. Bottom line: Don't think Marvel comics will kill off Pietro and there usually has to be 'some' synergy between movies and comics.