More likely, because MCU synergy.
And Clea was leader of the "anti-Order" team in the mini of the same name.
Well...
I suspect that's due to lack of familiarity. A good chunk of their story in the 90s centers on how they love each other, but they can't be together, due to their responsibilities to their respective realms. Indeed, one of Clea's last major appearances in Strange's ongoing hinged on that point.
There's a lovely tumblr post about their relationship that touches on the issue:
https://doctorofmagic.tumblr.com/pos...cleas-kiss-was