Trading with each other is going to be really difficult, if someone wanted to buy my keeper for example, I'd pretty much have to accept a cash offer. I wouldn't want to part trade with a poor goalkeeper who I couldn't move on for 8 months, but I'd have to trade for another keeper because of the minimum keeper clause, and even if I could...
Wait I think I'd have to buy a new keeper, then sell my old keeper for cash, or cash and players I actually want. I guess unlike with the A.I, players that aren't good enough for the Premeir League are suddenly going to plummet in value.