These are the moments that young players need to show their talent, they need playing time so they can more easily integrate with the core players and understand the philosophy of the coach. Young players are the future of the club, they need to explore their potential so they can enter the main team.
Their presence is very much needed because Munich's schedule is very tight this season, at any time Kompany can make a small rotation or give them confidence in them towards the end of the 10 minutes of the match so that they can hone their mentality and abilities.
This is what Real Madrid is mostly doing and I think Barcelona are also huge in their young players chance to play with the main team in order to integrate them into the main team gradually. Bayern Munich is indeed having a very tight schedule this season and they need to have a enough squad that they can rotate with, so having those young players ready at anytime to participate with them is the best thing they should do now.
Chelsea have enough squad that they were able to have two main eleven players to start at every competition they’re participating in, that has given them more confidence in all competitions and also reduce fatigue in the players. Bayern Munich are on top of the league table now and can’t afford losing that position, so they need to do all they can in order to remain there and that’s by strengthening their squad more for the big challenge ahead of them.