Honestly sometimes a character doesn't speak to you at least on a first playthrough and compared to the rest I enjoyed them more but maybe cause it feels like you spend more time with Bree, Sophie and Eve to me not sure. But something about her says friend zone more to me as well.
The other girls all have that holiday love allure, they all feel new, and they all feel endearing, like that one girl you meet at an airport, there's that tension about them that Mia can't have, because by design, she and MC know all about each other already(they appear to be VERY intimate actually), so that electrifying tension at every interaction that make you want to see the next doesn't exist, which is why most people put her down
Me personally that's the very reason I like her, she has the other kind of interaction I love, the warm and cute kind that screams love, the bracelet stuff, their closeness in general, how comfortable they are around each other and how much affection they show, the kind of thing you'd see in real life between a guy and girl and tell them to "get a room" or "get married already" because it's clear that's how it should be, I prefer that to the holiday love mood