It definitely is a shame the Belgian BB community isn't active on the forums nor interested in the NT/U21 as these are really nice feautres of the game and come with benefits to your own team.
I used to be a U21 scout and although i haven't been for quite a long time now, i still enjoy seeing the Nt/U21 prosper.
So in that regard atm i'm probably gonna give my vote to mplume as he has done a very good job in the past few seasons.
But that doesn't mean i' not considering Kalebam, you never know he might still make a very convincing speech orso.