Kimmich is great in the offensive play, but defensively he is no Lahm and still got a lot to learn there, but okay. He is a midfielder converted into a fullback, offcourse that is not just easy. He is really promising though.
Alaba is no way near his 2012-2015 form, but started to have decent performances again under Jupp. The problem to me is the roles, there is still some work to do there after the Pep and Ancelotti era. Also the face Robbery is not what they used to be play a role, now the opponents dont to worry about them as much as before, where most opponents especially in 2012-2014 shat their pants because of them, but that time is gone and we have to look for other options. Coman being out also hurt us, he has been terrific under Jupp.
Not to forget about James, he is a steal and gives us great dynamic. He started on the bench, but when he came on we looked much more dynamic.
Yeah bernat is a backup, Alaba had back problems just before the match. We should seriously try to offload Bernat in the summer, Its his own wish as well if the media is to be belived.