It's a benefit to me to see how players and positions do against other formations. And when I play my friend in an important match, I can have a better guess of what they'll use to win.

Personally, I wish it were easier to sort and view fixture history for friends. So when I face a friend, I can look back and easily find matches when they lost, or see if they are consistent with arrows. With many friends, the current chronological list can't really manage. After 2 minutes you might only find their most recent match up.

Add ability to hash by match type (friendly, cup, CL, league), and by manager or team name. Quick access to matches by week maybe.