I agree with scotyler, this happens routinely...
I've also had a similar situation as a board member of a nonprofit organization in the building of a new structure. The original engineering firm's work was subpar compared to the secondary work of another design/build contractor. We went with the second design and had a disagreement on $$ owed to the original engineering firm. We eventually settled before going to court.
All in all, it was a blip on the radar, and essentially was a nonissue. I suspect this will be a non-issue for LLEG. Worst case scenario, they have to pay for the engineering of the original firm, it will in no way stop the project, IMO.