I don't know if the whole post was for me, but I'll answer.
1- About the topic title, I agree in every point about the need of trained guys in any place instead of untrained players in England. But this thread is only read by those who are interested in following the NT's, so I believe that the players we "advertise" (legally) here are followed only by those who really want to train them, so it's better for us to be them having that player instead of some other person, with who is more difficult to contact with. Another thing is the patriotism. If a trainer has 2 equally talented trainees, one of them being from his country, he will give a bigger emphasis to that player training, neglecting the foreign one.
2- Once again, our thoughts are the same. I understand the need of a staff team, because it really takes some weight off of the coach. I think that the optimal number for England would be 3, since there are a lot of leagues but not so many active teams (this is another thing in need of change).
also, the results of a U21 coach can't be based on merely 2 years. if the oach before you did a louzy job, then you'll have 20/21 year olds during your U21 coaching years who aren't worthy of the U21 team. on the other hand, if the previous U21 coach took good care of the 18 and 19 year olds, then you'll have nice 20/21 year olds during your 2 seasons as U21 head coach.
so a U21 team isn't just a one man show. it needs a team of people in order to be able to keep track of all the guy's worthy of being trained, cause new guy's to this game will need assistance in training their talents... it isn't uncommon that the U21 coach proposes a training schedule to a coach who is trainig a futur U21 candidate.
x2. I agree entirely on what you said, the problem is many people only look at the results. And despite not liking the results, they don't help the NT's at all. There are good young trainees that could be very useful to U21 NT, but that don't even play. Even when they know about the benefits of a trained player or the profit of a sold 18 year old player with good potential, they don't do anything.
I could say more about these subjects, but I'd rather save some of my thoughts for the next week ;)