Overall, I would say no. This sounds like an easy way for writers to give their favorite characters multiple relationships at once.
"This is starting to sound like a bad comic book plot"
-Spider-man
“Evil is evil...lesser, greater, middling, it's all the same."
-Geralt of Rivia
This SHOULD NOT be applied on MaryJane and Spidey though.
Marvel, take note.
I'll be pedantic and say that "polygamy" is not a synonym for "polyamory".
Polygamy is having multiple marriage partners, usually in the context of a man having multiples wives. Often problematic.
Polyamory is the capacity to hold romantic relationships with more than one partner, with the consent of all involved.
The problem is that this doesn't solve anything. Marvel isn't interested on having the characters on happy and stable relationships, they aren't going to do so with two or more at the same time, they all break up at some point. I feel some scemma shippers seem to like this option (which of course affects jott more than scemma) but the problem is that this doesn't secure any of the relationships like some believe it will. It just kind of paints them as insuficient, all of them.
My only legit concern would be, how the next writer will handle it. Whether he will cherish it or cause more problems.
I mean if it's in character possibly
I'm not sure why people are so obsessed with making something happen that's not and Jean and Scott boning everyone. They were always pretty vanilla.
Marvel seems to just hate marriages for no reason. First MJ and Peter. Scott and Jean.
Wolverine and Jean just don't work together. Wolverine's had plenty of other loves as is.
Now Betsy has boned around for quite a while and her having more than one guy would be in character perhaps.