I could very easily see them releasing a 20$ dlcxp with things like espionage, foreign trade, and the like. But sort of like a lite expansion pack, that limited itself to a specific set of new features. Why would they include things like new civs, scenarios, or maps, when they can release those sperately at a greater profit.
They could even do mini expansions like: Espionage DLC for 10-15$
They could even do mini expansions like: Espionage DLC for 10-15$