Seems like they've decided to commit to the mess they left of what are clearly quest threads for her in Act 3 that can't be explored at all. Deeply unfortunate.
Theoretically if there really were an Avernus DLC for her, while it would be WAY more work to account for the state of her engine if it were fixable when going into such a DLC, it would make for a lot of fun narrative variation if you could go in with a fixed engine or without one. That is EXTREMELY theoretical though, they've not sounded super interested in making additional content around our current party members.
