I have seen how Munich played against Leverkusen, Aston Villa and Frankfurt, Defence is still a problem that Kompany has not been able to overcome especially in the last match where they conceded three goals. This kind of defense is very easy for Barcelona to penetrate, especially since their front line has been very productive this season.
If defense is still Bayern Munich's weak point, Kompany will definitely make improvements when facing Barcelona in the Champions League after the international break is over.
Barcelona is indeed in the best condition but Barcelona's victory so far is because the teams they have defeated are overall still below Bayern Munich's quality.
Visiting Barcelona's headquarters, I still don't think Bayern Munich can have high-level difficulties like the lower teams in the domestic league.