Yeah they just don't have enough coaches up here. Or facilities really. Plus the visiting team is around. They are probably playing sim games too. Essentially it's as if they are still in Lehigh Valley. If they feel like they are missing the action that's because they already were. Covey and Castro (and Lorenzen) got to stay in Philly and presumably Wilson will too if they go with a shorter bench next round.
Rhys is missing the action of course but he needs to be where those pitchers are. When he comes back, if they are serious, I could see them bringing a few arms along with him just like they brought guys up to throw to Harper.