I believe we've always been 1 round in the playoffs, with the exception of the finals being 1 week plus any remaining half weeks. I also looked back at what we did in 2012-13 during the lockout-shortened season, which we just shortened the regular season.
The only option for us would be to do a 13-week regular season and 3 playoff weeks, the last "scoring period" is a 1 day period on May 8th, which will be added to the championship week.
With the contraction, we reverted back to our 8 team playoff schedule.