In the mean time I added a gate right next to the box to get everyone to doom. As for the doom stablemaster, that's something I'd have to talk with Duck and Pure about since that's a pretty big dynamic change. Doom is sort of supposed to be a PITA, but if the "bosses" say it's OK, then we'll see.
If it was up to me, I'd add both a banker and stablemaster, but I'm a big fluffy marshmallow.