Talking about favorite teams for winning Champion League actually Manchester City is the first number and allow by Real Madrid then Bayern Munich, for Barcelona I don't really optimistic for winning Champion League tittle.
Even though Barcelona also has superior players like Lewandowski, for me it is not enough to just rely on 1 player like other big clubs which have full support from other reliable players so I have the same speculation as you that it seems like Barca will find it a little difficult to win the Champions League title this season this is because after losing Messi Barca will not be as strong as before.
Lewandowski is no longer the same as he was when he played in Bayern, age is taking its toll and just look at his numbers last year in La Liga - an astonishing result. A year has passed and I doubt that he has become stronger and not aged. Real doesn't have a top striker, so I personally now rate both City and Bayern higher than Real. But in general, surprises always happen in knockout games, so it’s far from certain that we will see these clubs play against each other again (I hope City will be knocked out earlier ).
I don't agree at all. You say Lewandowski had a good performance just when he was playing in Bayern Munich and after leaving Bayern Munich is not in the good form anymore in Barcelona which is completely wrong. Because I think Lewandowski had a good performance in Barcelona during last season and he was even the most effective player for Xavi and his team but we should not forget that Lewandowski is getting old and that's normal for any player to have a bad performance when he gets older.
Everything is changing right now and football becomes even tougher than before. Lewandowski is not that bad but he is no good too. His gameplay is so average compared with the last season when he was always able scoring in any match.
Barcelona was struggling to win the match against real sociedad and how can it win against the club like bayern or even real madrid? I can imagine if real madrid to have a great striker.
It will become a complete team right now. Barcelona is still far from being called as a strongest contender to win the UCL trophy. The preformance from this club is so bad in UCL compared with la liga.
Barcelona was only lucky enough to be placed in the easy group.