I agree with loaning out younger players. We should promote as many of our U-18s into the U-21s as we can and send out our U-21s players on loan. Why introduce a notion of feeder clubs.
From an Everton perspective, we want the sides our kids play for on loan to teach them things that are beneficial to us as a club. So given that RM has us playing tika taka, it makes no sense at all to loan players to route one style sides.
Equally, if RM is trying to instill in them good professional behaviours around diet, recovery, generally not going out and getting lashed etc. we don't want them going to a club who don't care about any of those things.
So for me, having a deeper relationship with a club, be it here on abroad, isn't just about dumping players on them en masse, but exchanging knowledge, expertise, maybe even facilities with those sides as well. Maybe even get some of the older players at Everton who are doing their coaching badges go and help out at the other club for a bit to gain experience.
Not a case of exploiting them but partnering with them. Get some win-wins.