Her point was that, first of all, Spring Man is still being treated as the mascot, with him being front and center for all of Min Min's cinematic, and even having his stage be the stage she came with even though she has her own. There's also that, as a sole mascot, Min Min freakin' sucks. While Spring Man, and to a slightly lesser extent, Ribbon Girl's abilities are there to help teach you the basics of the game, Min Min's got an entirely separate mechanic, and a lot more options to deal with. She's not simple enough to teach players the game.
Morrigan on the other hand, was always a beginner character alongside Demitri, which is probably what allowed her to become the mascot in the first place. In an alternate timeline where Anakaris became the most popular, I don't think he would have been turned into the mascot due to his much higher learning curve.