Some thoughts I've gotten from reading through the frames
The Bellamy is a very cool concept, but I don't understand the idea of having both an upgraded brace, and another reaction that's just that upgraded brace, unless I'm missing something out
The Vane is neat, no notes, perfect for breaching and clearing
The Naglfar feels, confused. Does a bit of everything and definitely got too many mounts. I like the idea but needs some refining, maybe
The Queen Mary rocks, as simple as that, really you made an actually fun to play Barbarossa and I love you for that
The Grey ghost is simple and fun, love the mod. Does feels like it can give room to a lot of busted builds, but it is fun, so I'm going to be trying on my own tables
The Osedax reminds me of a concept I was working with myself, fun stuff!
The Calypso! Love anti hack mechs, we don't see too many of them
The Harlequin seems like an absolute menace, works really well against what usually counters squishy mechs
The Atala steelbane acid is an interesting concept that I don't remember having seen before
I'll probably check the rest down the line, but save some adjustments, a lot of the stuff here is pretty interesting and creative, props to that, and to the lore you put into them!