I like this little feature. It's just a small polish item that makes using the CC harness a little nicer.

I also like how feedback is collected. It prompts to press 1, 2, or 3 to rate how well Claude is doing, and once entered, you have 1-2 seconds to confirm if you want to send more detailed textual notes. Then it disappears, not forcing the user to stare at the question if they're uncertain or don't want to bother. That's good UX IMO. Probably gets them a bit less feedback, but also stays out of the user's way.