Yea I've never been very enthusiastic about the idea of Sane joining Bayern. He is a great player and it would be awesome to have him back in the BL, but tactically it just doesn't make sense. Even before Davies you had Alaba at LB, who too is left footed and loves to bomb forward.I wanted to write the same .......the heatmap of Sane and Davies will be the same because they will stand on each others feet........a full-back like Pavard would be the perfect left-back for Sane at Bayern Munich.
I think this is just a statement signing the board want to make to show fans that they have ambitions to reclaim the UCL, regardless of how he would fit in tactically. He's never been successful as a RW so if Bayern decide to play him there, it will be a disservice to Sane's abilities.
Though if he fails, it would funny to give back to PL fans who always harp on about a few BL players who didn't do well in the PL