Ignoring KOTOR IIs lore was most likely intentional. Bioware didn't make KOTOR II and it seems like they go out of their way to avoid acknowledging it. Notice how much more emphasis they put on the first KOTOR which, while it was an amazing game, was not nearly as popular as KOTOR II? They didn't write KOTOR II so they want nothing to do with it. That's it in a nutshell, and it's pathetic.
It isn't just something they should of skimmed over, considering she rebuilt the jedi counsel.
I also agree that the Meetra we got in game doesn't feel like the Exile at all. I don't even remember having the option to act all psuedo mystical ******** in KOTOR II, let alone every line she said. Also they put way too much effort in to basically making her Revan's *****.
Couldn't agree more. KOTOR II may as well be N-canon as far as Bioware and Drew are concerned. What happened to the Exile was undeserved, imo.
As to the topic at hand. Nihilus' hunger had dominated his mind. His only thought was the next meal. This was his downfall. In reality, if Kreia hadn't been so conniving, Nihilus would have destroyed the galaxy.