it does have a nice tie into the story (kinda), however there are some holes
1) the only reason kreia gets mad at you is to tempt you, think about it when someone tells you no you want it more. kreia would tempt you with the dark side all the time, and yes the samething was done with visas so i don't see the bias with handmaiden.
2) plus she wanted you to train handmaiden so you could piss off atris so you could kill her (someone close to you) so you could then kill kreia ala crash of the universe (death of the force). as above tempting you by rejecting you. in short the handmaiden was a pawn to kreia (not very nice way to treat your daughter but look at papa vader)
it is interesting however and the more i think about it the more i like how it fits into the story.
HERES A THOUGHT!!! why can't someone from obsidian come in and clarify this!! or is like KOTOR 3 and what the old guard says is canon