I don't think Harper is the problem -- though if she doesn't right the ship in a few years, she'll be out I suspect.
And I disagree with the various "talent assessments" we've been hearing. Sure, the core is talented, but the question should be "Do these pieces make a team?" When I see a list like this -- Powell, Darby, Horston, Jackson, Key, with Franklin, Walker, Hollingshead and Puckett -- that's 9 deep of players who could probably play almost anywhere in D1, my first reaction is "How slow is this team going to be?" This has been a recurring problem at TN in the post-Pat years. For whatever reason, they attract tall, talented players, and end up with slow teams that can shoot over anyone, but don't really have the foot speed to play good team D.
This is sometimes put down to the lack of an elite pg, and this has been true for the most part. But I think the problem is more than that. The culture of listening to a pg on the floor doesn't seem to be engrained and hasn't been for the past few years. The core of Horston, Jackson, Key doesn't really play together in that way. I might even suspect they'd be better without this core. It pains me to say it because I've admired Horston from her hs days. But for all her talent, she doesn't seem like the player you can build a team around, nor is she content to play next to someone who is that sort of player. Burrell before the injuries seemed like that sort of player to me, and I often wondered what sort of tension there was between her and Horston.