Yes, the Growler is supposed to replace the Prowler. Yeap, the
Sparkvarks are out, and the aussie vaarks are the last of their
species.
SIGINT is the erm, "super" type. Under it falls 3 categories, ELINT
(Electronic Intelligence), FISINT (Foreign Instrumentation Signals
Intelligence) and COMINT (Communications Intelligence).
As for Jamming Pods, I'm guessing sooner or later all these
dedicated jamming aircraft will also be replaced by UAVs. If its
light enuff to be mounted on the wings of an aircraft, it can
probably be made to fly.