IMO the RPI will make more sense in weeks 7-9 than it has in the others previous as undefeated and 1-loss teams continue to play each other. That is where you'll see the "opponent's" records come into play.
Teams like BGM, Tri-Center, Sioux Central, (opponent's records: 23-31), Belmond Klemme (22-32), Alta, Neuman (24-30), or NT, Hinton, SWV, Ed Co (21-33) will need to win out because the only thing holding them afloat are their own W-L records. AHSTW's is bad too at 21-33 but I don't see them losing any games, and at the very most 1.
As undefeated and 1-loss teams with bad opponent's W-L records start to lose, you'll see teams with 2, 3, even 4 losses by week 9 but with opponent's W/L records above .500 creep near and/or into the top 16 in RPI and above those teams with a low opponent's W-L percentage. What will suck is if a team outside the top 16 RPI in week 9 ends up winning a district.
Also, the rule is that any 3-way ties will automatically qualify. A 2-way tie is not achievable because the head to head tie breaker. So a 3-way tie in district 5, 8, 9, or 10 would maybe keep a team in D7 out of the playoffs that deserves to go. that would also suck.
No word yet on whether the playoffs will be seeded based on RPI?