After re-watching and even taking notes (was planning to post them here, but no time with next game soon), Purvis was even worse than I remembered. He made a few nice plays, including a really nice box-out (one of our few), but in general he made bad decisions with the ball, committed far too many turnovers, took questionable shots, and lost his man on defense a few times.
Facey also played pretty lousy defense, especially guarding the pick and roll. He doesn't give you much on offense either, except one nice play where he actually dribble penetrated and found Larrier for an open 3.
Gilbert played great on both sides of the ball, so that makes total sense. Jackson didn't make much of an impact honestly, but Enoch was atrocious (they hit like 3 3's when they dribbled right by him in PnR and forced the rest of our defense to collapse to contain it), so I'm not sure who else you run out there if you're set on replacing Facey.