I maintain that U21 and NT training are two different beasts. It's hard to view long term NT outlook, and also train for the U21. Not impossible, as there are builds, such as PGs, and true Centers where the NT training path nets the prospect on the U21. Stretch 4s, balanced 3s, LI guards, and true SGs on a NT build are not usually where the U21 would love them to be at. The great draftees, and the prospects managers spend 2+ MM on are definitely unattainable for the majority of the US managers.
It is not that often where a U21 prospect maxes out above a SS potential build before the end of their U21 season.
Not often. Tanner Winn did. There may be one or two Centers a season that do. SFs, PFs, PGs, and SGs rarely do. I trained Otto Reedy until he was 24, and when he was on the U21 team he was similar to some 28 y/o PAS guards on the market.
In past years manager's eyes didn't survey much beyond MVPs. An unusual build, or a really thin crop at that position and you'd see lower potentials.
That won't be me. I won't offer any radical builds, but I will change the way these players are scouted. What they're at now. What their cap is. How many pops, and where, would it take for them to actually cap. That could mean more PAS, and SS players on the U21. It would be ignorant to look at a PAS, SS, and possibly AS, say that they're good but you think they'll cap out before researching that exact question and seeing if they could feasibly contribute.