Santi Cazorla isn't a Segundo Volante... The new version of the tactic is defensive and makes the game defense first which isn't the tactic of arguably one of the best teams in world football at the moment.
Looking at Man City who sometimes play 4231, they don't have KDB playing at DM... While Rodri might sit deeper, he's taking shots from the edge of the box constantly. And obviously Bernardo Silva is playing more of a 10 role when they are in the 4231. So maybe Rodri is a DM, but KDB isn't a DM and nor is Silva... The idea that this is "normal" just isn't true. It's the game forcing us to do something because the engine doesn't properly work for a true 4231. Even the game developers admitted that and said as much with their comments. The AI picked 4231 tactics and stuck attacking players in CM when the game thought it should have more defensive players in those positions. But that's not always the case. Man City's 433 for instance will invert FBs and push into midfield next to a deeper Rodri to make a 2 CB, 3 DM, 4 AM (2 inverted wingers with 2 CMs that push into attack to create double pivot higher up the field generally 1 for each side to overload using width for penetration or byline cross), 1 Striker formation.
If the tactic must be this way, then they need to divide tactics for in possession and out of possession. Obviously it's hard to see the Man City or Arsenal tactic unless you watch teams at that level a lot and understand their play style. But Arsene Wenger used an attacking 4231 for decades, to his ultimate demise perhaps. But that's football, you should have a choice. Not have the choice taken away from you. (FM 16,17,18,19,20,21,22 all have the choice, why are we going backwards?)
Add 4231 Wide back to the game. Allow for the AI to pick 4231 DM Wide, and let us play the game. The irony is because the AI was choosing this tactic too much and putting attacking players into roles that devs wanted to see more defensive players proves that even the AI wants to see more goals and this defensive tactical style to the gameplay ruins said gameplay.