All I want is a single good reason to recruit Generals :C
With how much effect bombardment has on ground combat and how much game mechanics encourage swarm tactics (limited planetary garrison vs INFINITE NUMBER OF INVADING ARMIES), the quality of armies and their general plays no role. 30 naked assault armies attacking a fully bombarded planet vs 30 Gene Warriors decked out with attachments and generals attacking a fully bombarded planet... literally has the same effect. Generals, attachments, even high tier army units are pretty much just expensive status symbols. The planet will be taken and no losses will be sustained in either case, Gene Warriors led by a General will merely look better doing it my head RP.
But I'm going waaaaay off topic! I'm sorry!
I agree that Leaders should play a bigger role and there should be a lot more interaction with them, both domestically and diplomatically. It's not the focus of Banks and Utopia, but I hope in the future they will have more personality, presence and function, as opposed to being passive bonuses with a portrait.