Jamming and Cloaking are often used together, since the point of both systems is undetectabilit. Why not just make them into the same block?
They serve
very different purposes. Jamming is a cheap tool which helps you stay hidden as long as you are not seen, prevents missile locks and generally makes you invisible to automatic tracking systems. Cloaking is a system which adds to jamming by making you invisible to the naked eye, since a ship with a jammer can still be shot by anyone who is facing the right direction.
Maybe the cloaking block could
include jamming functions, since you'll never use it alone as far as I can tell, but I can certainly see a case for keeping your jammer on all the time and only cloaking once you get close enough to be seen out of the window.
While we're at it, I think Jamming/Cloaking needs tuning. Right now, a perma-cloak ship pretty much can't have either an interior, or hull, of any kind. I think that, instead of Jam/Cloak being limited by power consumption, that it should instead modulate to the mass of the ship - a more massive ship requires more power to hide. This can make cloak ships useful - specifically, stealth fighters, which makes the Sensor System more useful - but without imbalanced stealth builds being a problem.
The current cloak works for me; it works as a tool for getting very small ships (scouting / spying probes) into an area safely, but doesn't allow for a fleet of massive 'Bird of Prey' type ships to uncloak and nuke a station. Cloaked dreadnaughts are just begging to be abused.
That said, I can see cloaks, jammers and warheads being quite an easy combination to abuse...
Let's assume #2 happens. Do docked ships (such as ship elevators) cloak/jam? I haven't tested it, because cloak/jamming is not a viable strategy on the kinds of ships I build - you actually can't maintain cloak/jam for more than a second.
Assuming you could ever get past the huge costs involved (maybe a lot of capacitors and very efficient reactors) then I agree that docked ships/turrets should also be cloaked.