Muller just seems to understand football so well. I was a decent player as kid never Premiership quality, but even I can nearly always see the run a player makes (of course this is much easier with a wide view rather than in the game, which makes top players great). With Muller he makes runs I would never have even thought about after seeing replays.
Apart from his brilliance in top games, there's this one passage that sums him up. Bayern last year were on the counter. It was something like 4 vs 4 and Alaba was breaking out with the ball. Muller had made a very clever run to lead away the defence and Alaba should have passed it to the other player that was not open. Instead Alaba did a poor pass to Muller, which was slightly behind him. Muller had to slow down to get the ball. At this point the counter was dead and the momentum stopped. Then out of no where Muller played a pass and made a run. Suddenly that simple pass and run he made reopened up the counter. I think this time Bayern missed an easy chance, but even if they had scored the stats would not tell the story. Muller did not get an assist here, he did not make a key pass and did not score, but it was his movement that created the chance. It's difficult to explain and I tried to do it quickly.
For me though an equally big problem with the possession is Lahm. I hear Bayern fans constantly saying things like Messi, Ronaldo etc have never troubled as before. They are right, but that is because of Lahm. It's one of the ultimate testaments to Lahm's ability that players like Messi and Ronaldo have been kept quiet (not just for Bayern, but Germany as well). This is actually why I predicted Bayern would beat Madrid in 2012. Lahm is a top player and you can play him left back or in central midfield and he is still going to be world class. The big problem is that Rafinha is not world class. Nor can you expect Lahm to suddenly be good at right back after spending a season in the middle. In every game he has played right back he has been bad this year.