I thought you skipped Claudia.
I have no idea of what I'm doing with Lin. I just drop her field then DPS with the other characters (or with her, floating, which is fun). This game has way too many moving parts for me to make sense of them. For now I left her weapon at 100 with some bad matrices... I'm to lazy to swap them around. No idea how much my DPS improved, especially because I was spending time in the abyss and they're bullet sponges in there.
The new main quest is pretty cool by the way, finally some decent -if not that original- story. Although I haven't finished it yet because, well, it makes you explore the abyss and it's pretty huge and complex.