So after playing her a bit, although her kit feels a bit on the weak side I feel the biggest missed opportunity is not allowing gun usage during her 4.
I love the kit, but when I'm flying I'd love nothing more than use my penta, my ogris, my torid, lenz, opticor, or even her signature archgun. But I can't.
Her shield gating immunity allows her to use heavy weapons much more safely than any other frame, and her flight would further cement that value, being a heavy weapons shield maiden flying above the battlefield.
I know its unlikely to happen, but if I could even just use my archgun while flying it'd be the most satisfying thing to have available to me.