Hey,
I am a bayern fan from Germany and as there have been barca fans in our German forum, I would like to tell you what I think about the upcoming match if you are interested.
First of all, I can assert that every Bayern fan I talked to does NOT believe that this is gonna be an easy match for us. I would still say that this is a 50/50 match, especially as it is only one leg. I even have a feeling that you are going through simply due to Messi and I still worry about Suarez a lot. Even though he did not perform the way he is actually able to, in one match everything is possible and he still has the class in himself. Last year we dropped out against Liverpool and we played absolutely horribly under Kovac. Yet we managed to play 0-0 at Anfield and with a bit of luck, we might have won the game - simply because in one game everything is possible.
I expect the main duels to be Davies against Messi and our midflied against yours. Davies had an absolutely outstanding season. Nevertheless, he also had games where he was struggling a bit against quick players just like Diaby from Leverkusen in the cup final. The way he plays as left back is extremly offensive. That might be a real chance for us as Messi is not really defending at the box for you but on the other hand there might be a lot of space for Messi in case that Davies does not get back in time. Messi will surely use that space a lot more clever than any other player before and this might become a huge problem for Bayern.
It is a huge loss for Bayern that Pavard is out against you. Might sound a bit weird as he is not a spectecular player but due to his injury Kimmich cannot play as CDM. With Kimmich and Thiago we were a lot more dominant in my opinion even though we did not lose a single match with Kimmich and Goretzka when Thiago was injured before corona. Goretzka is not the kind of possession player I would have liked to have in midfield against you to really hold possession and create chances. Vidal will also be extremly motivated against his former club - I remember him playing for us against his former club Juve in 2016 and he was probably the best player in both legs. He has this mentalaty to play a lot better just because it is a big game.
One problem we also have is Coman. He did not manage to do anything against Liverpool last year against Atletico in 2016 and so on. In big games against great defenders like Robertson or Felipe Luis he hardly ever manages to get past them as he always does the same: Put the ball forward and run. Semedo and Alba might defend him just as well - as I heard Semedo played really well against Napoli.
Apaprt from those player duels I would say that our team simply plays better together at the moment. Nevertheless, with a lead for you it would definitely be very unpleasant for us.
Anyway, I hope it is gonna be a great match and that no one is gonna get injured by friday. So fair play!