I am here to report that the unique universes are dumb. Sure, it might be cool to have your clone follow you around or something like that, but they basically suck. I mentioned that I got the one where Andreja took over Constellation with her zealot friends and let me live because I put snakes in her coochie. Obviously she gave me the artifacts after doing that, because who wouldn't, but then I couldn't interact with her any more than randomnpc_004 where you click them and they just say one of a couple phrases over and over. I even went into the console and confirmed that when you target her she's not even really Andreja, just a generic npc they made to look like her.
I thought maybe after I collect the artifacts she'd talk to me. Nope. So I could never interact with her, never have any companions, even going to The Eye was just me strolling into an empty station and clicking the nav table to find another temple. I finished the NG+ run, but it was even less interesting than a normal one. I even went back to her when I had nothing left to do but go into the Unity, and she still didn't say anything, not even a Hail Serpent God or attaboy or anything. No special scene while in the Unity either (although amusingly it still had the one that talks about how the remaining members of Constellation (who are all dead in this universe) study the Unity and bring enlightenment to the universe or whatever crap it says...instead of "House Va'ruun dominates the galaxy and everyone has sex with snakes"). Completely fucking worthless.
So now I'm back to thinking maybe it IS a feature to not be able to save or use your inventory there, because it is a completely pointless existence outside of the first minute or two of seeing how it is different. I would never play through another unique version like that, because they truly are "lesser" in every way except for the one cool thing you encounter immediately. Which is good because now I don't have to seek them out, and since I'm now NG+10 I can just stop and play normally again. Might be a little difficult to shake the mindset that looting and scanning and dialogue and essentially everything doesn't matter like it doesn't if all you are doing is skipping the main quest to power through runs.
tl;dr watch unique universe clips on YouTube if you really care, otherwise just reload and get a normal one. Trust me.