IMO, No problems with the previous MSC. Professional, easy to communicate with, and zero problems with either their schedulers or editors. I only did the S&F shops with them to help them out; now it is just their big pay shops for me. I owe no favors to the new MSC (which I find not nearly as professional) and will put the new S&F shop on my 10' list. Poor pay, pointless narratives, and requirements for photos: never.
All that said, I cannot imagine not being called out for double spacing a narrative. Its straight txt people, not formatted. Editing with extra CR/LFs tossed into the text would be a real pain.