Haha, I knew it! I predicted exactly this!
I have quotable posts and everything. About Illidan killing Xe'ra. About her trying to convert him by force.
I still very much approve though. I'm one of those few that would have actually loved to see a Light Illidan, but I did note that Blizzard hasn't been white-washing Illidan at all. He's still the same old dick that's not set any foot towards redemption, despite Xe'ra's words.
So, this development fits a lot. And is a very nice twist. I'm sure some people will be sour on it somehow, just as they were when they thought Illidan was actually going to be Light. But it's certainly the kind of misdirection that's got my approval.