The biggest takeaway from that RM-Stuttgart tie for me is that RM are woefully unbalanced with Bellingham, Mbappe, and Vini Jr all in the side.
Valverde is put in a similar position to Rodri on occasion, but is much less dominant (though, I would still love to bring him to City).
Stuttgart only lost because of truly woeful keeping. Otherwise, they could have easily drawn that match… at the Bernabéu.
All three of those players mentioned are mega-egos all playing for themselves, and none of them really seem to care much about the defensive side of the game. That, in my opinion, is going to continue to cause a lot of problems for them against decent opposition.