No, you used parentheses ( ) instead of brackets [ ]. That doesn't work. Only brackets work. So try again.
I have not looked at your book excerpt. I went on the assumption that the person meant Old Man's War, which I have read, because you told us your novel is about an alien invasion and Old Man's War is about soldiers dealing with aliens. Whereas Agent to the Stars, which I have not read, I do know is a comic work he did that hasn't much to do with battle and alien invasions.
Ah, okay, got it. That's a different thing.
What I meant by 'single point of failure' is one single point where destruction of a single item thwarts the whole invasion.
Yes, that was silly. However, the bigger plot hole was that they made the aliens telepathic and that was a main way they communicated. Which means that there's no way that Jeff Goldblum and Will Smith could actually sneak on to the mother ship (even though that was actually the best written part in terms of dialogue and acting.)
In 'Independance Day' the single point of failure was the mother ship. Although the invasion fleet was dispersed over all of the the major cities around the planet, destruction of this one single item allowed the destruction of the entire fleet.
Similar thing with Transformers, Dark Side of the Moon'. we only had to destroy one single item on the planet to win.
Didn't see that one yet. However, the thing with the Transformers universe is that the invaders, like the allied transformers, are small bands of refugees from what's left of their populations and so their operations are limited. My understanding is that the machine that is destroyed in that movie was a peace-making invention, so it wasn't actually brought to Earth by the Decepticons. They just try to take advantage of it.
'Battle for Los Angeles', similar again
Sort of, but not exactly. Armies do have centralized communication/command centers and the particular alien army has a lot of robot drones, which a lot of countries now have in their own military. So the small force manages to take out the communications center ship for the one force of many, which incapacitates a lot of their drone weaponry, disrupts the ability to communicate with their forces and causes a temporary retreat. But the soldiers have not actually won the battle, much less the war, and L.A. is a smoking ruin. They simply uncover useful information and make it back with that intelligence in a brief pause in the fighting. The remaining soldiers of the group the film follows heads right out again to the next battle, because they are stupid. The rest of the movie was not bad, especially the alien autopsy.
In Cowboys & Aliens, the cowboys take out a mining/scouting operation of one ship. This was probably considered more feasible than what was in the original graphic novel, which concerned an alien ship that crash-lands on Earth, takes over a small city and then tries to get back in contact with their homeworld to bring in an invasion force.
There are of course numerous alien invasion scenarios. Movies are framed in a 2-3 hour block and have to have some sort of resolution and may be using the aliens for symbolic purposes. So they often do have a simplistic, shoot the lasers into one vent and it blows up the Death Star set-up. You might like films like Skyline or Monsters.