Okay, got a ctd when i alt tabbed from playing hypercorp, got one when i manually tried to build a extractor and got one randomly in a fight. Just mentioned it although it was probably totally unneccesary, hehe.
The biggest issue was that i didnt get up any info on ships/buildings etc when scrolling over it, which limited me somewhat.
But all that aside i did manage to get a good look into what it will be like, and i like it, alot. When i built extractors i noticed that it also seemed to act like a refinery. I assume this is something to differentiate this faction from the others? Even if its just eye candy i like it. It makes for a different experience, so thumbs up there.
I also liked the ships, i actually expected them to be, you know more shiny and polished. They did feel a little rough around the edges, but that in itself made them stand out, i just had to change my shiny new tank look to somewhat dirty well used tank. hehe.
The models were great dont get me wrong, just different than what i expected, but it was a positive experience so not saying i didnt like it, cause i did. Felt more grimdark if you know what i mean.
I liked all the models i could see, they felt like they belonged to the hypercorp faction, which gives good immersion factor, in my oppinion there is nothing worse than a mood breaker in a game so i am happy with this. So far you have done a fine job of fitting the various models where they belong with all the factions really.
I also liked the voices that were implemented, they could have been taken straight out of allied military operations(somewhat atleast), but thats what i pictured from the hypercorp factions so good fit, more voices like those and it will be a strong, good voicepackage.
Lol i wish i could come up with some bad stuff, you know, constructive criticism, but so far i just havent been able to come up with any. Which is good in itself or what? 
I did notice the new moon you have implemented. it is a moon i assume? Or is it some orbital creation. It looked fine by the way. If it is a moon, may i suggest that you implement some build options for it. Like some moon based orbital weaponry or maybe something else if you have any good ideas, it could also have population centers etc just like any planet or give pretty much any bonus you wished it too.
I have never understood why stock sins didnt have planetary weaponry that could target enemy orbitals. Even today we have missiles that can reach high into space and theoretically shoot down incoming meteors or space junk. One should expect that in the future they would have more effective stuff. Sure you can fill space with installations, but that dont change the fact that you have to be able to maneuver ships up there aswell and there is a whole unused planet which you can fill with missile silos and high powered energy weapons or mass drivers or whatnot. I think the mod distant stars have planetary weaponry so could probably take the mechanics from there, which i think is a fine idea. Its kinda stupid that ships can just approach a planet and bombard it into dust without any opposition from the planet itself.
Thats what i got to say regarding hypercorp and and the moon so far. I will play through the other 3 factions next and see what i find to comment on there. Hopefully i will find something to harp on and not just praise everything. Or not. 
edit: first thing i noticed when playing nephilim was that the moon had hp. Now that is interesting, so it can be destroyed. Does that mean you intend for it to act as a starbase of sort? Is it a real moon or an artificial construct of sort?
i noticed that the beam defence platforms of the nephaim in this version are a strange texture. I dont know the technical term sadly. They are like totally blue with team mesh enabled and a slightly less blue without, they used to look distinctly different i seem to recall.
Another strange thing that happened was that when the enemy retreated from attacking my planet, they didnt phasejump away, they flew away slowly oh so slowly, 3 mins after they had crossed out into the great black they were still visible in my planet bar.