I recently had the opportunity to fly into Munich and I must proclaim it as the most passenger friendly airport I have ever experienced.
I don't believe it was more than 100m from the plane to immigration and the baggage carousel. From there, it was a short and easy walk to the S-bahn for my ride to the Hauptbanhoff. Granted, we didn't use one of the mobile lounges...but as I understand it, those are only in use until T2 opens next year.
I have never flown to Changi or the "new" airport in Hong Kong, but I would be willing to bet that Munich compares extremely favorable to any airport in the world for ease of passenger use and convenience.
Way to go Munich!