The only reason EWU's RPI is so high is because they were able to schedule games against Washington and Gonzaga. Their wins are against Idaho (236), CS Northridge (121), UC Riverside (258), and Cal Poly (317). So yes, the Griz are playing a weak schedule, but its not like EWU is getting any strong wins either. They're just losing to teams ranked high in the RPI. Hard to judge at this point.
I like the Sagarin ratings to add on to the RPI. Takes into account for the scores as well. It's great that a team plays a tough schedule, but if they get beat by 15-20 every night, does it really mean anything? The RPI is nice for seeing who a team has played and beaten, but can be misleading since schedules can vary so much and all it takes is to play a couple of top 50 RPI's to boost it, even if you lose. Take Delaware State as an example. They're RPI is 85, but they're record is 2-8. There's no way they should be ranked this high, but because their opponents have good winning percentages, it boosts their RPI even with their poor winning percentage.
Sagarin Ratings (RPI):
Montana......................70 (95)
Idaho State................137 (111)
Portland State.............141 (119)
Eastern Washington.....147 (113)
Sacramento State........167 (172)
Montana State.............213 (274)
Northern Arizona.........240 (285)
Weber State................268 (290)
So look at MSU. They are near the bottom of the RPI, but since they've narrowly lost most of their games, they're probably a better team than what their record (and RPI) indicates. I think MSU is going to be a scary team come conference. We'll see how Stuckey responds come conference now that he's developed a name for himself. BSC teams are going to key on him and see if EWU has anybody else who can carry the load. It's going to be fun to watch and no game is a gimme for anybody.