What it sounds like is that she's still, emotionally, tremendously unstable. He also doubts that Azula, of all people, will lack motivation or a plan for long. Things change. For one, he's here.

Minds like Azula's...they tend to think in balances of power and in plans to achieve more of it. Seeing a tipping point could by itself prompt a change.

"I guess we'll see then," he responds, carefully.