MMEs have been in driver’s hand about 13 months.That's pretty disappointing, but thanks for confirming. With the connector being modular I would think it's only a matter of time before Ford sells connectors that allow you to plug the mobile connector into different receptacles and adjust the current based on the receptacle's respective rating. That said, the MME has been out how long now?
Truthfully I have not needed to adjust the charging amps on my car, but it was nice to have the option in case I needed to jerry rig something for some obscure plug that Tesla doesn't offer.
The problem isn’t just the connector - the EVSE needs to be able to recognize the connector attached and limit the current accordingly. The FMC simply does not have that capability.
Several 3rd party EVSEs do, as others have mentioned.