The IANA iana plan transition working group formed at the ietf90.
IAB is in charge of the IANA stewardship transition plan and it needs input from the IETF therefore the IANA plan working group is being formed at the IETF90.
The IAB is in charge and should get their feedback from the IETF, a place to confirm that the IAB is doing the right thing.
So the IETF approach is to mainly focus on stability and the transition, document the process and not make the NTIA "more nervous: unnecesserily so. Don't rock the boat
Need to capture a couple of things that are in the NTIA's contract with ICANN and are not covered in the RFC.
Incremental MoU improvements such as ones in the 2013 are here.