Kimmich is a great no. 6. Actually we do not understand the full back plans either - especially as he gets his match time this season in midfield.
As a full back - I do not even think he would be great as a conventional full back - but he could be great as an inverted full back who adds to the midfield, too.
All the rumours... - Bayern in the recent season did not buy the players they were rumoured to get. I do not see Sanchez in Munich as I think that Uli will not want it. The spanish and portuguese speaking group gets too big. It is fine with the ones that adapted fast and speak German now fluently - but it seems to be too convenient for the newer ones to get around without doing... I am not in for too many German players - but I like the mix. There for sure must be some German players and especially some bavarian ones - but the international players usually give the flair. Aren't there some good polish, croatian or french wingers or full backs...