My 2 cents
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The BBB are a very good idea and I also think that a "not arcade" system is the best one but of course there are now too many advantages for those who plays BBB.
Money and training above all. 50% in my stadium means a revenue of 100-130k/week, that's not bad at all and probably 2 more players to train (and maybe sell making $$$).
A solid team can easily fight on 3 fronts, championship, cup and BBB and BBB is a great help to build a team more "strong" than my opponents.
We have 1 full season to think how to decrease the benefits of BBB
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1990-2022 Stalinorgel - https://www.youtube.com/watch?v=pV-Xppl6h8Et