(SPOILER)I gave it to the Angara too. I was suspicious it would try to hack and take over SAM, which would be bad.

I'm using overload, incinerate, and concussion grenades, along with an assault rifle. It's great fun.

My guess as to the plotI'm thinking we're the bad guys and the Kett are the protectors of the universe. The Angara may have been bad too. I'm guessing long ago they created the remnant and the scourge for reasons, so they Kett came in to take them out in an act of galactic protection. The did a good job, and the Angara forgot most of their history, but the kett didn't understand the tech or how to use it, so they made the planets degrade as a defensive mechanism.