No clue. Maybe there's some minor typical anime plot building up where there's a big bad guy somewhere, and the administrator wants Kirito to beat them. Cause like I guess Kirito has to have something to do or focus on while Inoda is plowing away. Maybe the admin wants to steal Kirito away from Asuna? I honestly don't believe in the one I just mentioned.
In terms of rewriting reality, I have no clue why she would want to, or what purpose it'll serve. I think some theorized that the Administrator is also hanging out somewhere in the real world, so it doesn't seem like she's trying to descend into the real world if she's already there. But since she does mention typical goddess like things, maybe she's just here to fuck around and laugh about everything (the chosen one statement would debunk this train of thought though).
It would be amusing if the Administrator is on Kirito's side (even though Inoda stealing Asuna should imply otherwise). Like the end result is still Inoda takes Asuna away from Kirito, but Kirito ends up bagging every other girl and feeling empty because his main girl was taken. How likely is this? Unlikely at all, but I'm trying to throw up a scenario/thought based off the "chosen one" statement and the implication from previous updates that your choices can seemingly effect the result of others. In this case I guess it'll imply to be Suguha, Alice, Liz, the Administrator herself, and Shion (don't know why Shion would matter due to how detached she is from everything).
but yeah idk rofl