442 is the only formation that dont became ilegal If any of the player sees a red.
But of course you dont expect to see reds in everygame.
Oh come man... You know better that there are other formations with more than 3 defenders or 2 midfilders... 4-3-3 narrow diamond 4-5-1 (unless the striker gets a red) etc
By the way what did the maple leaf formation look like I forgot...
I will try to beat you with 4-1-2-1-2 Narrow Diamond Formation