Timer on drones. phc spends 50 quanta for line of sight for a limited amount of time. the same mechanic should apply to substrate IMO.
let's say I see drones deployed and I use quanta to block abilities and to save my worker. after 1 min, the drones are still there and the turret will drop on the rads so it's pretty bad game design.
If let's say i have fast fingers and I counter block the drones and if those drones would expire after let's say 10 seconds, if they use them again they would not have enough quanta to deploy the turret. As it is now drone is a very good time investment, it remains there to harass phc for free.
Draginol, if you are reading this please consider that done ability to give unlimited vision for substrate is too much.