One of the points that was made a long while ago is that the classes should encompass all kind of play archetypes, so that every player has a particular style they can associate with with respect to Android classes. This framework also allows the Android classes to be distinct in feel from each other.
With that in mind, what kind of playstyle or Class-based interaction is still missing to you? So if you would design a class, what kind of design philosophy/focus would you implement that would make it distinct from the currently existing roster?
(This focuses on the S2 class infrastructure. A class "like S1's (X)" isn't a helpful response in this case)