For us no on is impossible to beat. In contrary we are still the benchmark and we will be. All we need is a good defender and a new coach if Tito will be absent again.
The games aginst bayern were no test at all we can be so much better even if bayern plays better than in the past. With an fit Messi and Neymar and a team whos not tired we will have the chances. Although this year Bayern will play more games than ever and now other teams know their style better than in the first year so they will face some teams who only park the bus. An dont forget the new coach who needs to adept and some cocky players like Robben or Ribery might get problems when working under him and now they have won the silverware their deep hunger for glory has been reduced imo.
Although big tteams in the CL will be even more aware of them now.