Even if Rare was continuing their work, their update policies would be going through the same policies as Iron Galaxy’s. So a different team wouldn’t solve anything as (assuming and hypothetically assuming) both would want to iron out these bugs at the quickest time possible and at the same time test the game so it doesn’t get left in an dysfunctional state.
Please keep this in mind as IG and MS goes through these bugs. They’re all very aware of the issues and plan on squash all bugs as quick as possible.