It would be nice, so that one could practice with more players/teams without backing in/out...especially when it comes to custom teams.
Would also be nice to have full defensive setting control in Scrimmage. To be able to set P'n'R strategies, individual defensive settings, etc. Lots of serious players would like to be able to practice various defensive schemes in the Scrimmage setting.
And, please: Scrimmage and Practice Plays in MyTeam, not just Freelance.