Congrats on the great award. I'll let someone else answer your questions.
I'm sure you're happy with the award, but could you have flown from MIA-IAD-JFK-ZRH instead to experience LX's new First Class? Or were you looking for the quickest way to get there? The old LX F is great, the new LX F is even better.
You'll love the FCL in MUC. Yes, there are showers.