I agree with you. It's not a well liked view here obviously, but I think we are fine at PG.
That said, I want Carey because he is an elite recruit at the perfect timing. HW will have a year in, and Frank will be a senior, like you said.
Carey is perfect to transition things along, as I see him as a two year player, tops. Frank will be gone, and then HW runs the show his last two years. While also contributing some at the 2 in years one, and two, I believe. His shooting is great, and solid length to slide over for a few minutes.
It works for everyone, if everyone buys in. I'm expecting big things from Frank, so I'm on your side, but he just has to play his role whatever that may be.