Anyone good enough to start isn't a wasted scholarship. He's a solid starter. Nothing special. If we had better DEs he'd be a very good backup.
Your idea that a bust is a wasted scholarship is simply stupid. KM is a bust so far. He's still been good enough to start and play a large number of snaps and we are better with him than without him. Not everyone is an all American, and being less than an all American doesn't make one a waste of a scholarship.