I would like to see an option to save 3-5 different lineups so a manager can swap out players and formations quickly and easily (particularly with the new squad screen).
Example:
Lineup one-- my best 11 set in a wide 4-3-2-1
Lineup two-- my best 11 set in a narrow 4-1-2-1-2
Lineup three-- rest my best players for playing a bottom of the league zombie team.