To add some numerics to this subject: Attached is a scatterplot of FRC all the events played so far this year.
The two District Championships outperform all of the standard events by a large margin on both average team performance and competitive balance.
If the past is any guide,
http://www.chiefdelphi.com/media/papers/2711, the CMP divisions will fall somewhere in the gap between the MAR event and best of the regular events (Bedford, Pine Tree).
The IRI, as always, will surpass everything that comes before it.