The only benefit to loans are if the club has such a shortage of players that they're first forced to play him all the time, and then secondly that he does turn out to be good, so his value over the course of the loan actually goes up. Unfortunately plenty of clubs get in loaners as cheap last resort cover, have no interest in developing players for the selling club (and why would they), and the end of the loan spell is met with a derisory offer or a loan extension, until the contract runs down, at which point they try and grab him on a free.
I wish we would just put an embargo on Italian clubs. Or better yet, since they're probably worth about £50 combined, buy the lot of them and have them dissolved.