I would agree that Harry's new "persona" is much closer to the actual truth of the situation. Of course, even if it is, he's still so used to flipping through personalities that he might ignore the temptation to stay as this Harry. His strength is in rapid change- Metamorphosis.

I'm glad you find his perspective compelling. I tend to believe in it absolutely when I'm writing him, which probably helps.

I don't think Harry could give up Metamorphosis now without ripping out half his soul. Draco will probably set some limits, but if he wants Harry, then he'll have to accept Metamorphosis, too.

No idea on the purring personality.