Similar path, I was very skeptical but Claude touches over 90% of my code now. I review almost all of it though. I did not have high expectations for Claude Design but yesterday I tried it for a workflow tool I'm building and in one shot it made something much better suited than standard component libraries. Some more back and forth interspersed with errands etc used up my CD quota, and the result looks better than most of the software I use (it helps that I value information density and clear affordances for interactivity). I haven't tried applying the design to the existing code yet.