I'm not in favor of the 50+1 rule to go away. I'm just tried to make a point that as long as finances in the Bundesliga stay as they are, Dortmund and all the other clubs won't be able to keep their best players, because some people suggested that they aren't even trying anymore. The truth is they might try all they want, but they are economically not able to and won't be as long as things remain as they are right now.
The 50+1 rule might be a handicap for people taking over a club in private ownership - but it is not a handicap to invest into a club when you see that the club is managed very well. But the Bundesliga just is not as attractive to invest into as the EPL were just much more money is in and where there is much more acceptance for foreign investment. An investment from a Saudi investor in a German club like at Newcastle would cause a mega shitstorm of dimensions you do not want to imagine... - the scenes would be very different from the ones you have seen in Newcastle... You just have to see how many fans still see Leipzig, Hoffenheim or the company clubs like Bayer or Volkswagen - and how much they protest in the stadium - or the Qatar discussions at Bayern...
Most clubs in the Bundesliga know that players will not stay but see them as an investment for further sales, too - even clubs like Dortmund or Leipzig. If players get too big for them they have to sell them - and no, Bayern is not the first one on the list but the other big clubs in Europe. There is only the German players and some french players that e.g. see the french contingent.
I think that the problem of the clubs behind Bayern is not Bayern first but the other big clubs in Europe. Yes, sometimes a player wanders to Bayern - but usually never when it is a bidding war with other big European clubs. And they might have right now a good take on french players because of the french players they already have in the team - and the french national team plays them in the starting formation.
No - it is not that it does not matter who plays for Bayern or who the manager is. If you look into the squad you will see that the main players since Pep with the most time were Neuer, Müller, Lewandowski, Kimmich - and before they left Alaba and Thiago. And what Flick did when he took over Bayern was to get Müller, Kimmich and Alaba from jobs on the wings into the vertical axis of the team (again) and give them the command. When he took one of them out Bayern had problems. I remember a Cup match against Hoffenheim when Flick substituted Müller and Lewy at 4:1 in minute 82... At the end Bayern luckily went through with a 4:3 with Hoffenheim having chances for the 4:4 short before the end. After that Flick was even more careful with substitutions. Lewy's killer instincts, Müller's commanding and cheerleader skill, Kimmich's passing and workrate and Neuer's sweeper keeping are probably the main reason for Bayern's last seasons. And with Coman, Gnabry, Sane and Musiala we have 4 interchangeable wingers that took over from Ribery and Robben of a high quality.