I agree it's not inherently bad, but the systemic part of the problem is that she's running an offense that she has players that aren't suited for it. A two post offense works best when you have a strong perimeter game. The perimeter game may well yet show up. We'll see.
I think even running a 4 guard, 1 post lineup wouldn't change anything. Assuming Diamond is playing high post, that still leaves three players on the court that have been dead weight on offense so far. At least with the two posts, you have an extra scorer on the court.
Reynolds, Carter, Cooper, Middleton and Jackson need to step up their games in a big way for Tennessee to have any chance to salvage this season.