To be fair there aren't that many moons in the Beta, especially around the large gas giants.
In our own solar system Jupiter has 67 moons, and Saturn, 62. OK, some of those moons aren't very large, but its still a lot more than around gas giants in game at present. Part of the problem may be the list we are selecting nav objects from is only a single limited layer at present. If it were hierarchical (i.e. Stars -> Planets -> Moons and Stations) we'd get more objects in I suppose?
Another thing that bugs me (though has been described as a feature of the Stellar Forge) is the number of dual bodies - terrestrial or rocky planets with large moons in very close orbit - just looks wrong. I'd imagine the tides on such worlds as pretty scary.