I think the idea of a stealth technology that reduces scanner capability is a good one.
Same method as Cruise, Core inactive while in use
Does NOT require batteries because it consumes the Core while operating
Vulnerable to cloak disruptor
Fits in the Counter Measure slot
Cannot operate at the same time as a Cloak
Does not render the ship invisible, just less scanner range
This would give scouts and such more potential since they could theoretically get in closer without being seen.