Having watched that match and people wanting any of these 'youngsters' anywhere near playing in the first team really need a reality check.
I always like the old Juventus philosophy of trying to integrate a talented youngsters every season in the first team and having two or three in the squad. Then after 4 seasons or so you have a core of club produced players. A talented play can often not look very good when out on loan but they need that time in the first team playing with other quality players to bring their game on.
When bale was on his way to Madrid i hear a lot how it would improve his game to play with world class players, i guess that only works then if your good and want to play with great players, not if your a talented youngster who would improve with a season of first team football with good prem level players.
An example i would give is carroll who i think offers more then dembele would improve far more at spurs playing games then he will at qpr.
The case im putting forward will never be proved right or wrong because we will never do it, but i remember from a few years ago when southampton sold le saux to chelsea they used the money to stay afloat and could not buy a replacement so played a young guy called bridge.
The southampton coach giving the interview i remember said that in the first 10 games bridge was so bad they wanted to replace him but could not afford to(before transfer window) then after 30 games theyb thought he would make a solid defender for them. Halfway through the second season they thought oh we have a player on our hands now.
Regardless to what you think of bridge and im no big fan but talking about how a player can improve when he plays first team football it is clear they play better the more football they get, and a talented player will often look better in a higher league then in a lower one. Beckham and lampard both looked a little average when out on loan.
Loan moves are for first team game time and are not the best indication in my opinon of whether a player will make it, that will be down to the coach at the parent club when said player returns to the club and he gets the chance to see him in training with the better players.