The RFI requires among other characteristics, two specific requirements:
1. Very high Survivability
2. Medium Weight.
They might appear to be mutually exclusive, and very reasonable, but given the current level of material sciences and Engineering limitations, they are mutually contradictory.
If the IA wants very high survivability, they will have to sacrifice on mobility, and compromise on weight. That is what the Russians, the biggest proponent of Medium weight MBTs have done with their Armata Platform. The Americans with the GCV reached 84 tons, before being cancelled(?). Actually, The Americans estimated that they'd need 200 ton MBTs to cater to complete protection against the modern threat environment.
If they on the other hand want medium weight, they have to be willing to sacrifice protection.
What you have at the end of the day is an RFI that's again more fancy than fiction, which implies that there will be enormous difference between the RFI and the RFP, or worse, repeated changes to the GSQR as the designing progresses and the RFP requirements are found to be unfeasible.