As much as I hate to say it ... 15-0 = cruising through the cupcake part of the schedule.
Now they're 7-8 in the "meat" part of the schedule. Not too difficult to see that this is not really a great OSU hoops team, and the record against the tougher competition is finally causing the team to show its true colors.
The biggest problem is 2-fold:
1.) Lack of a quick start to games.
2.) Lack of a proven/consistent scorer, and the inability to hold leads or remain competitive late due to the lack of said scorer.
In most of the conference wins, OSU had a late 1st half/early 2nd half run that allowed the game to break open. OSU seems to score in spurts. When they're hot, they're hot. When they're cold, they're ice cold. No middle ground, it seems.
Just my $0.02 worth.