What evidence do you have to prove that Bayern actually radically changed their game this season? I have seen them in several games in the CL, crossing, shooting from range, scoring from set-pieces and lots of wing-play. How is that radically different to anything seen before? Sure they would have lots of possession versus teams that park the bus (10-man Arsenal, a weak United, minnows in the Bundesliga)
Also, your claim that they have been much lesser than previous season is not so readily obvious. For one thing, they walked their league even easier than last time, but of course, when top European clubs are willing to adjust particularly to frustrating your game, you will be suffering. Is that so hard to understand for some people. You are also forgetting that they were facing a rather good team tonight, and the first Ramos goal virtually sealed the game. That's knockout football. Bang! and you are out...