There's no guarantees that we'll make it back in. If anything the odds are worse that we will given the strength of our squad versus the other contenders.
Bayern are one of the best teams in the world right now, and also have the strength financially to maintain that.
Players also tend to look at the immediate future not long term so that's why you've got people like Reus and Muller turning down ridiculous offers from us, that's why Di Maria wanted to go to PSG and not us and so on.
Oh and much as I like Manchester, Munich is absolutely beautiful. It's a much, much nicer city with more to do. Granted this last one is just an opinion. Plus I bet it gets more sunshine than Manchester and Bavarian girls are absolutely lovely.