There are multiple parallels between her and Ani, but very fortunately they only go so far. Spider and the knife he got to his throat, among all else, are more of a motive to go Vader if Kiri is no longer around, but I don't feel such direction is planned at all, either. She seemed more rattled than he was when it happened. He was more like “Shrug. Mom wanted to kill me again. Whatevs. I will have a difficult decision myself in the next scene I need to focus on.”
Kiri so far is totally opposite of what the speculation after the first film was, because the visual effects seemingly indicated Grace's personality going to Eywa, and nothing going towards her avatar. Now the same visual effects seem to indicate anyone communing with a tree, so it no longer means anything so specific. (Then again, linking with an avatar didn't transfer consciousness, either, so that was a stretch to begin with.) It seems that's not a retcon, since Grace doesn't seem to have ever been planned to return. And the ponytail can communicate/transfer as little or as much as the plot requires, and about the same/similar way as the linker machine, and probably equally similar to whatever new thing they used for the recombinants.
For that reason, I wouldn't read too much with her oneness with the Force, though it probably means a little more than the [SPOCK]“Remember!”[/SPOCK] visuals, since Avatar 3 is already 90% filmed, so there wouldn't be anything so much to retcon. She likes plants better than people like her mother, she use her ponytail more extensively, and Eywa likes her as much as she liked Jake when they first met (Jake clearly wasn't a son of the planet), so she's also heard.