Edit: Not required; Logic Connector and Logic Splitter provide this functionality. D'oh!
------------
Having the ability to define a tag as global vs local to a subset of parts (defined as being any contiguous pieces not linked through a decoupler or factory part) would make automation of multiple child drones more workable.
Case Study:
Mothership contains a button tagged "Always On" as Global for all child drones to use to thrust right, continuously, in order to circumnavigate the planet. The mothership automatically pumps out the child drones as soon as the factory parts are ready. The child drones would be designed with TNT, set to explode within proximity of an enemy.
Each child drone has a Local "Tilted Left", "Tilted Right", and "Ground Too Close" signal used to keep the sub-drone level and prevent it from getting stuck in pits.
The current setup (unless I'm missing a group feature or similar) would be triggered by ANY of the child drones and cause ALL sub-drones using the signal to tilt wackily or fly upwards endlessly.
Alternative option:
Add a logic layer to the view and having signals wired using cables strung between pieces from "Input", "Input2", and "Output" connectors, so we can visually see which sensors and logic are triggering which part actions. This would also inherently limit signals to within a sub-drone, preventing cross-talk between child drones.