Both IMO. They don't look like they're running any kind of offense, and Walker not Miles are particularly good passers or floor general. I was watching Muhl and Westbrook and they are constantly barking orders and resetting the offense. Horston was doing that, but not the others.
Walker isn't really a PG and Miles can't shoot. We've all trashed Muhl here, but she's a significantly better PG than any of Tenn's options. She's not a big time scorer, but she knows when to look for her own shot. Miles only shoots when the shot clock is winding down, not when she's open.