Yes, the LH seats rival AC economy seats for the worst long haul experience - thankfully I fly LH longhaul in C or F!

But to my mind the connection in MUC is a big positive over connecting in FRA. I don't know if it is worth for me personally for the 11 hours in LH Y, but does factor heavily in my decision making.

and my user name has nothing to do with that preference, MUC is truly easier than FRA for connecting, and a wonderful airport