my vote is also in favour of LX here. Although you have to take the trams to get from A to E, ZRH is still less painful than MUC when travelling to the US, just because with that second US specific screening at the Gate, they suck at MUC.

If you go longhaul anywhere else, I prefer MUC because of better offerings in the terminal area and you really just need to go up one floor when connecting from a Schengen country.

But the second security screening in MUC they still do not seem to get a handle on it.

A different picture, when you succesfully upgrade. The lounge offerings are better in MUC than in ZRH