Also dont see how kasaki is able to underestimate Bayern, they're just too good. I actually think its a shame for heynckes to go as it is his team and guardiola may want to twist it around.
Ribery while having a quite game is actually a very intelligent player who can drop deep and push the ball upfield Aswell as play quick one twos and move the ball fast instead of being a hog, he can also go more centrally and be more of a playmaker for them so I don't see him really struggling.
Robben on the other hand is no longer a starter but can be pretty dangerous coming of the bench (he also can pass a ball, contrary to popular belief).
Adding Javi Martinez has given better shape to Bayern's midfield, he has good technique, good passing ability, psychically imposing, has an engine and he's pretty good at interceptions/positioning on top thus making for Schweinsteiger ideal partner.
Toni Kross has developed so much over the last couple seasons and is playing his best football so far, also he has a beast of a shot.
Mandzukic is your typical poacher ala Klose, hes been on fire over the last weeks.

plus they also have Gomez off the bench.
Muller is probably the one I like the less but he's pretty effective.
Their defense is not bad, it is actually pretty good, Lahm is quality, Badstuber and Dante are good defenders too while I think Alaba is a decent player albeit not excellent at defending.