Players on loan

[lord_phil]

I would suggest to introduce the possibility of giving/receiving players on loan, and not only selling/buying.
It would fit in case you want a player to grow up and get it back once he's become better, especially for young players.

[t11_fan]

Good idea, but it would be useful only if you want to sell them later for bigger money.
If you want to let them grow to become (later) important player in your team, then you should tank and stay at same league lvl.
Endless number of lvls and promotions is reason why loans wouldn't be useful as they are in real life.

[RJSlow]

Players do not progress fast enough for this to work like it does in real life.