This week, I've been printing a lot of little D&D characters for my son. As a result, I've realized that simplify 3d doesn't auto-generate support for dangling parts that otherwise pass the angle test. These are parts that when printed layer-by-layer, end up being printed over open air. For example, an elbow in an outstretched but bent arm, the bottom of a round shield, or the pommel of a sword held in the hand.
For those parts, I have to remember to go in and manually add support. This seems like something Simplify3D should do automatically.