Just watched the scene where Obi-Wan and Yoda discuss Anakin's readiness to take on a Padawan, and a fairly dark thought occurred to me.
One of the biggest questions to arise from Ahsoka's introduction has been - naturally - how her apprenticeship to Anakin ultimately ends, since obviously she's nowhere to be seen in RotS. (I don't particularly think she'll die - at least not before RotS - I find it hard to believe Anakin would be trading jokes with Obi-Wan the way he does in the beginning of RotS if his Padawan had recently died.)
Listening to Yoda say "To let go of his pupil... a greater challenge, it will be," it comes to my mind: perhaps the Council (at least Yoda and the other more senior members, not Obi-Wan) never intended Anakin to see Ahsoka's apprenticeship through to her Knighting.
Giving Anakin this responsibility/relationship just so they can eventually sever it to prove a point about attachments - even if the training is going well - is the high-handedly manipulative (they'd think of it as "necessary education") sort of thing I could almost see them doing. At the very least, I can see them choosing to split the pair if they start to think Anakin is becoming too irrevocably attached to her... regardless of how well things are going otherwise. (Perhaps it's Karen Traviss' own lack of love for the Council bleeding through and nothing more, but there is also a point in the novel where Yoda suggests Anakin's not ready to take on a Padawan after all, which Anakin does immediately suspect as yet another one of Yoda's mindgames on him.)
And it would definitely add fuel to the deeper-rooted resentment/mutual mistrust Anakin has of them in RotS. They give him the responsibility (and honor) of training a Padawan learner, and take it away even though he's doing a good job... then they give him the honor of being on the Jedi Council, but make it clear it's with deep reservations and he won't be a Master. Not to mention Anakin wouldn't take kindly to seeing his innocent apprentice, and her own hopes and dreams for great Jedihood, being yanked around for the purpose of manipulating him. It'd be even less wonder, then, that he decides to tell the Council (in the most devastating possible way) where they can shove it not long after that.
Or maybe this is just my own lack of fuzzy feelings for the Jedi Council leaking through. ;)
Oh, if only this brainpower could be useful in my math class. :P I find it much more fun to use it this way. It feels good to have new canon fodder for speculation in one of my big fandoms again. :)