Yes you would. She's has superstrength, can fly, and shoot/absorb energy. Moreover, her whole origin is tied to the Kree (and to Mar-Vell, though you can cut that out if you want).Why wasn't Ms/Captain Marvel in here? You wouldn't need to explain her
I don't think there was any need to have Jane in the film. Thor didn't have any downtime, and returned to Asgard immediately with Loki. That sensibly leaves his own storylines to continue in his next movie.