It does seem a little like that. I wonder if it has to do with the number of strong people that are coming up in this arc though. We've been introduced to Killua's way of assessing situations before. I think Pitou "shocked" him into running for his life, and the whole Gon thing is pushing him now.
Honestly his fighting before was pretty smart, and it prioritised being alive above all else. What it doesn't help with, is when you're trying to save the world, which protagonists tend to do. As a simple pay-to-kill assassin and fighter, Killua's doing just fine. A noble warrior, he is not.