I am a neutral vote on the brink of downvote.
So first of all I've been growing steadily more iffy over the past couple days about alt-foundations. We just have so fucking many of them. It's absurd. But that's not a huge problem. If the alt-Foundation's got a twist or the article has a hook, we're golden. This brings us to my main problem with this article.
It's well-written, sure! But it's an alien invasion. It's Independence Day; it's Battle: LA; probably a bunch of novels as well; probably more films that I didn't list; probably a few more video games. Here's the thing. An alien invasion in itself is just really boring at this point. It's as boring as zombies. There has to be some personal narrative. I'll read a novel about an alien invasion if I can get some cool writing or nice character insight. But this is an SCP article, it can't have either of those. So problems arise. This article is nothing but an alien invasion.
Well, okay. This article, if I'm reading it correctly, is the wreckage of an alien invasion generated in the aftermath of some superweapon explosion which was so powerful it punched through space and time and dumped all this shit on our planet. Which is, in essence, nothing but an alien invasion. Even the news reporter sounds like a news reporter from a movie about an alien invasion. Even the letter.
I would like this article a lot better if the aliens just stayed in orbit and bombed us into oblivion. I would like it if it did something with an alien invasion, because you can't have cool writing, you can't have cool characters or character development, and plot's irrelevant in alien invasion stories because come on, an alien invasion is just an excuse plot at this point. Maybe explore one of the common objections to alien invasions? Why the fuck are they coming for us? What'd we do to them? Where do they come from? Stuff like that.
man that brink is beckoning me closer
edit: oh, really minor quibble—you seem to be going for hard-ish scifi, what with the relativistic kill vehicles and whatnot, and the thing is, i don't think lasers…cut. certainly not cleanly.