I honestly don't follow the goings on of the NT too closely. U21 takes up most of my Buzzerbeater time.
As you know, the main point of interaction between the two programs is the "next-gen" project of starting a few young players on a NT track each season that may make them unuseful to the U21 team (HoF bigs pretty much). While I support the project it's been an issue (at least to me, the main advocate for U21) to not water down the big man talent pool for U21 in World's year age classes. Otherwise the training needs for U21 players that may qualify for the NT eventually don't clash too much. We've discussed this recently, and I suspect if I'm re-elected we will need to discuss it further.
Group hug!