Sure, when you just look at score, the Yewts performance looks pretty good. But consider that they only scored one offensive touchdown. Also, total, in the eight drives that didn't end in a field goal, touchdown, or the end of time, the Yewts totaled 20 yards.
One TD drive was the product of a decent drive (67 yards, 5 plays). Another was a punt return. One FG was the product of a good, sustained drive (54 yards, 16 plays). One was anchored by a single 67-yard pass. One was a 50-yard FG, and the other was a 48-yard FG.
This says to me that the Yewts offense is really struggling to move the ball. The broad stroke numbers may show a lot of yards, but the majority are from a few big plays. The Yewts rely on HUGE plays to move the ball or get points on the board. Those plays are possible against lesser opponents, but teams in the PAC12 aren't going to let them get behind coverage like that.
I think that the Yewts will still win 5, but I think getting 6 will be tough.