Let me preface what I'm about to say with the following. I'm not saying Pep is a bad coach. But he has coached one team, and it was arguably the best team ever, even stronger argument for MOST TALENTED team ever.
Personally, I love Jupp Heynckes and wished he still had the drive in him, but unfortunately he doesn't and wants to call it quits after this season. Of the managers that are readily available, Pep is definitely the best option and I'm glad that Bayern was able to pull him, I just hope that he doesn't try to change too much because Bayern is fackin rolling right now. The only thing in their way is slight age at a few spots (Ribery, Robben, Schweini - but none of them are even 30 yet - 29, 28, 28) and injuries. Arjen Robben is known to be a glass figurine, but he's actually held up decently so far this year. Ribery gets the occasional knock because he is literally scared of taking on nobody. I don't think Schweinsteiger is 100% from the achilles injury he had last Spring that hampered him late in the season, especially in the CL Final. Mario Gomez got injured in the preseason and they've been treating him like a baby ever since, which isn't too costly because Mario Mandszukic is playing like a stud. And finally, Holger Badstuber, who MARK MY WORDS, will be the best defender in the world within 3 years (the kid is 23) f*cked his knee up back in October and is missing the rest of the season.
Long story short, I love the outlook for my team