With JJ Richardson playing well in spurts last year and Travon Woodall getting much better as the year went on, Dwight Miller's fate was looking worse and worse.
As Fittipaldo mentions, this has not been confirmed by Pitt yet. But assuming his information is true about Moore, I'd expect Miller would be the one to go.
He put in a lot of work with Rockets great Hakeem Olajuwon and I'm sure Jamie Dixon doesn't like the way this looks. But Miller would likely have been hard pressed to get minutes anyway, so this is probably best for him.