I agree, Universe at War: Earth Assault *IS* the most asymmetrical game I am aware of. All 3 factions (especially Novus and Hierarcy) play very differently.
There is a fine line between symmetry and balance... making 1 races sb mobil adds a clear advantage that is not offset by torp cruisers... when adding a major structure such as a star base - there has to be both, the line has been crossed.
As of right now, top cruisers clearly win. Nothing can stand up to them (structure-wise, that is). As such, I think a lot of the complaints about the SB's have less to do with real balance concerns, and more to do with "coolness factor." In other words, a moving starbase is just plain cool to most people, where as torp cruisers, while highly effective, are just boring old cruisers.