Alternate team appearance
When the "Just a Minute" sign appears, hold X + Circle + L2. Keep the buttons held until several seconds after the sound of a puck is played. Now when game play begins, teams will have different jerseys with injuries enabled.
Seven game series
The game defaults to a one game series. To get a seven game series, start a seven game playoff before the end of the season. Then, the "continue playoff" option should be available. Now when the season ends, it will automatically overwrite the old playoff, but retain the seven game format.