I meant the ability to actually get the controller to some secure place.Right, the point of them is to both make distributed defense more feasible (because they provide hefty per-planet firepower that doesn't detract from your main choke's available cap) and to make it more desirable (as that's how you keep the controllers).
If we can't protect them they will have similar issues as Adv Fabs. And this means that usefulnes varies on game settings/rng positioning etc..
It's possible that they need to give more turrets each, or as suggested elsewhere to give some of every core turret type, or something like that, but the point is to increase the viability (and desirability) of distributed defense.
It seems to be that they are double-edged sword. Instead of giving a cookie they give you a cookie but you can't eat it.
They force you to defend more locations to just have them. After that you need to pay costs and energy for their actual bonus. Are they worth enough to make defending their world feasible?
Even with distributed defense you want to choose where you defend usually. Showdown is meant to prevent that also so you have 4 planets to defend plus any planet you might have with controller or you need to resign from help of controllers.
I hope to be able to play a bit soon so I will see how this works in practice.