2- The catch 22 doesn't hold up. You pound a shield long enough, it goes down. No matter how much research your going to put into it. I mean seriously, why would you put the shield generator in orbit? Its like like a castle with the key to the drawbridge on the outside.
thing is, that key is defended by 100 guardsmen and is on the farside of the kingdom.
I think its balanced, personally. it keeps someone from just not being able to get at a planet, which is far less useful.
1- Capturing a planet isn't instantaneous, it should take some time. A sustained siege would be the only way to accomplish this. A marauding force would have to be able to hold off sustained attack from relief forces to capture te planet intact. Otherwise they can just bomb the heck out of it and move on.
wohoo, I took the planet... so...
now those buildings way out in orbit are suddenly siezed? aside from making me confused... you seem to be violating some causality issues there.
3- The orbital structures are ultimately not stand-alone. They would have to depend on their home planet for resources, material, and personnel
thats not the way I see it. any half brained twit would know that putting that much energy into creating sustained supply lines for orbital structures
1) very very costly over simple stockpiling.
2) um... makes your planet very easy to attack
do you see my point? these big-ass structures (forget now, the automated ones) should have their own supplies. at least IMO.
beyond that it certainly (undeniably, for I am absolute and correct) adds a certain element of tactical usefulness to a sustained combat, yes, you took my planet. but now all of my structures have reverted to geurilla tactics, so its going to take you a while to clean up the retaliating mess before you can use this planet to your advantage.
it stops such annoying rants as when your enemy jumps from place to place throughout your solar system taking planets and then instantly capturing the remaining defenses. dont tell me "blah blah sustained siege", because that could be as simple as keeping a sova ship behind.
this idea may work for the advent, but they are a completely different dynamic.