Bayern is getting a lot of bashing after their last game, but I don't think it's all that bad.
If they have any performance problems at all, that would be a problem with consistency not the lack of skills.
In all fairness, they performed better than I expected from them, given the not-so-great league performance last season and the fact the club took a gamble with a manager with very little experience in the highest level of competition.
They could've done better in the league game against Eintracht, and one point in an away game against Leverkusen was a decent outcome (they've one all the other league games), considering how dominant Leverkusen have been in the prior season.
The 4-1 loss to Barcelone might indeed look like they got outclassed, but if you look at the game stats, Bayern dominated in ball possession and had a similar number of shots on goal, so it wasn't as one-sided performance as many seem to think.