I already have problems with 2 matches per day, not 'cause I can't watch them, but 'cause I often can't prepare team for the next game. The idea of 4 matches per day could work only if trainings would have nothing with condition (if we could train each type of training twice per day and that's it)... and if condition loss would be cumulative (all condition loss would be instantly regained after the game except small amount that can be regained only if a player doesn't appear in next game or few). More games a player plays in row, with less condition he will start next game... Or... you could add a feature that teams can have more than one formation setup (one for each game in a day).