Musiala could turn back great, there is no need to start talking about someone else this quickly. I get it, he got injured a few times, and now going to miss a long time, will come back probably second half of the season. This is why we are not going to really see Musiala be absent for that long, he is a young player and could be future of Bayern Munich.
If you already start to talk about replacing him, then we are not going to really see how this could be that much of a difference for the long term. I believe it should be doing a lot better, and we could make sure that we are dealing with a lot better return without a doubt. If we can do that, we can definitely make some return without a doubt. Most people need to just let him be, and not stress him out.