If you make a new station, please make sure the genetics cloning room is larger than like 9 squares. It would also be nice if there was some sort of a corpse loading bay right outside of it with cryo tubes. When you have 90 people on the station and 20 of them die all at once each round from a radation belt, it becomes a huge vomitey mess. I'm not sure about how the delivery tube system works, but it would be cool if you could have them at the start of each wing to take you around the station faster. And keep the bridge in the center of the station.
As for my opinion on the other two maps, the visitation for brig on Metastation is neat, and the split down the center for medical and research is cool as well, but genetics is too small. For Utopia there seems to be not much going on with solars, genetics is too small, and I couldn't find the bridge. But the fact that it's built on an asteroid is really cool.
I would choose Metastation to be our station because it's much more streamlined. Utopia has an interesting layout, but it's sacrificing too much in what is already a big ball of confusion that is a server with 80 people. Having a bridge at the center of the station is basically the best landmark you can have in case you get lost. That and you want all the heads to be able to reach it in the same amount of time during an emergency.
My other concern is that even in the late hours of the night we often have like 30 people on. Will the larger stations be too big? How easy is it to change maps when the population dies down?