For the expansion/reprints, we are actually probably going to a keyword-type system i.e. Dispatch: + 1 Labor symbol where Dispatch is the keyword for when units are played.
I like this idea, but I'd recommend something other than Dispatch. One person in my group got tripped up on Dismiss/Discard/Destroy because the words are so similar. Destroy being discard rather than dismiss really confused her and I can see why.