Let's be anti-Fleck for a minute and be really skeptical about how he wants this to go do.
1. Maybe he wants Rhoda to play because he knows he's bad, and he wants the team to lose as much as possible this year for whatever reason.
2. He actually believes Rhoda is the best chance to win and that winning games this year is more important than preparing for next year.
3. Despite Rhoda not being good, the other QB's aren't sitting in the front rows of class (or some other PJ rule), so on principal alone, he's not budging on this issue.
4. The other QB's are really, really, bad, and the players not only don't rally behind the other players, they also threaten to boycott if someone else plays. (or he hates them)
5. He is painting a picture so Tanner Morgan can succeed. "No, not going to pull his redshirt". Only for a few weeks from now for him to say... "Fine, I didn't want to do it, but it's our only choice". Having only compared Tanner Morgan to Rhoda, he looks good compared to what was there. Then everyone will say, "Wow... PJ really knows QB's better than Claeys or Kill ever did" (part of this plan would be that Green or Croft never get to play in case they actually have talent).
It's gotta be one of these I would think.
My guess is he becomes a lot more likely to play Tanner Morgan this year yet if he gets a high level QB commitment or two for 2019.