Man, I like Hana, but she isn't really helping her own case. She actively rejected to do most if not all the efforts to popularize her and pull up the rest of ID as a result, like when she rejected her 3D the first time because she wanted the rest of the wave to get it too, when in corpo you've gotta work with whatever you're given. Pretty sure it's already been mentioned a couple times, but I'm pretty sure she mentioned liking her community being small and personal, which doesn't really work in a corpo setting; I'll be shocked if she extends her contract, since going indie would let her stay whatever size she wants, on top of pushing whatever LGBT content she wants.
I'm not sure if this is still the case as I haven't watched Zen in a while, but on top of having that, Zen also did a bunch of physical comedy with the model, something I don't really see a lot of Vtubers doing (with Filian currently being the main one for that). Like it or not, the menhera does have strengths people can like Zen for whether they're a dude or not.