Universe Sandbox2 does a wonderful job of showing how things in systems relate to each other. It is easy to see how moons rotate around planets and how that fits in the bigger picture. However, it is sometimes a little hard to see how the local system works - for instance, the moons of Jupiter swarm around it in a big cloud with bodies that make all sorts of (apparent) turns and loops, but it is nearly impossible to see or estimate how the orbits actually relate to Jupiter and each other. Might it be an idea to add a mode where these can be seen? So, not the orbits of the moons around the sun, but those around Jupiter or their respective parent bodies.
If I am missing the appropriate setting I apologize and politely ask to be pointed towards it.