At least all LH planes ex-MUC (except for flights to FRA) are MUC based
Huh? A ex-MUC flight may be part of a FRA-CDG-MUC-TXL-FRA circulation, just to make up an example. Obviously with a FRA crew. Not to mention multy-day tours, where planes with a FRA crew are parked overnight, then could continue to MUC on the next morning. Btw, I think LH has continental stations in more cities than just FRA and MUC.