btw for Barcelona it looks like this will only be a rumor or wishful thinking if they want Barcleona 
They must be realistic now because of the fact that bringing Dani Olmo alone yesterday they were troubled and even let Gundogan leave Barcelona to register Dani Olmo. Especially if they try to sign Musiala, who knows how many players they have to get rid of lol
Well unless they can sacrifice some of their star players maybe this can still happen. But it is quite natural actually when Musiala is targeted by Barcelona because Flick must realize that he can match Musiala later, especially Flick's style is different from Xavi where when Xavi always tries to hold back some of his players it might be a different story with Flick later to find alternatives in order to smooth out his plans. They must be realistic now because of the fact that bringing Dani Olmo alone yesterday they were troubled and even let Gundogan leave Barcelona to register Dani Olmo. Especially if they try to sign Musiala, who knows how many players they have to get rid of lolBut the problem is in terms of price and Bayern itself will definitely limit this player to be made as a recruitment target by other clubs because after all Musiala is currently one of the future progressions for Bayern and as you said that Musiala is a good regeneration for Muller so that when Muller leaves they don't have to worry because they have found the right replacement for the position behind the striker.