For better or worse, if Kyrie does leave, I believe that the franchise will invest in Rozier as our PG of the (near) future. He is still young, incredibly athletic, and has shown flashes of brilliance (and quite the opposite at other times). The youth movement would be in full swing and with Rozier getting a lot more PT, his value would at least be a bit higher based on raw statistics. He is seemingly considerably better as a starter than a bench player, as well.
As for Hill, I could get on board with him as our bench PG. He is a solid defender, an excellent 3pt shooter, and would be a steady veteran presence.