There's an interesting thread on r/LigaMX discussing the expected turnover within the FMF.
There's quite a lot of back and forth and dissent, but a lot of the dissenters are in the wrong, IMO.
FMF is rigid in ways USSoccer is not, and that's part of why we've taken control in a rivalry they used to dominate. Not that USSoccer doesn't have its own flaws (see 2018 and failing to qualify), but we've pretty much got the machine rolling at this point as far as player development and all that, and we've dealt with the reckoning that missing a World Cup final meant pretty well. We're flawed but very young right now, but leaps and bounds ahead of Mexico's system at this point.
(As an aside, a few were like "yeah well the US just started signing dual nats that had no business play for the US. One poster put that to bed. Here's his response verbatim:
"Lol what a terrible take, do even a little bit of research.
Musah and Dest are the only ones who apply, and even then Dest chose the US because he was always in their youth teams. He grew up playing with these guys. Ferreira has lived in Texas since he was 10, he never accepted Colombia call ups.
Weah and Reyna are even dumber to be included. Weah literally grew up in Queens and played for the NY Red Bull academy until 17. Reyna grew up in New York and played in the NYCFC academy. Reyna is literally the son of US national team players, mom and dad. He grew up American in America..
It’s like saying Mexicans from Los Angeles were poached from USA, even though they are full Mexican and identify as so.. and even if they didn’t, you sound like a clown for gatekeeping national identity")
Mexico managed to avoid their reckoning, via a confederation playoff where they just barely avoided missing World Cup final in 2014, and even now the traditionalists prefer to keep the flawed system that put them in this position rather than adjust. They think the solution is to become MORE insular.