Minimum spacing on final for the same runway is 2NM, as far as i know they can only reach the planned capacity if they do alternate runway approaches and use visual separation (do not overtake) on final. Hopefully it will become a bit better with the new runway.
Runway lottery is the same in MUC, however usually you can guess a bit better which one it will, but sometimes you still get the other one. Late runway assignment is a pita, especially in a boeing with no secondary flight plan (hopefully the next FMC update for the 737 will have it) and a required complete new nav setup and briefing. Re-assignemt on the ground however is not nice, but not a big issue either. Simply hold short at the required runway, take your time, do a new setup, new briefing and a new performance calc etc. Best to warn ATC that you need a few minutes though.