After reading
this, I've changed my mind.
Scoring for opponents will probably be quite common, given the complete shakeup of last year's rankings. A team that was 15-1-0 at the Waterloo regional last year dropped to dead last in the rankings. So that will depress top teams' OPRs since they'll spend some of their time scoring against themselves, and slightly elevate lower-performing teams' OPRs since they'll be getting some help scoring.