I know this would require a fair bit of work from the development team, however, I think it would be a benefit.
I would like to be able to have a search running for particular player types/ages/start rating etc. so when a player comes on to the auction market, I get sent a message, and an option to make an instant bid.
I know that you can filter in/out selections at the moment (very useful), but I would like to see that expanded.