For context, this blog was released the same day Canva made their announcement for Brush, which looks to be further along in this area: https://www.canva.com/newsroom/news/canva-brush/
I'm glad Figma is pushing in this area. I do think that Figma has one of the best UI datasets out there in the world, and for the most part they've been sitting on it letting it get unused. Excited to see where they take this, but I do think they should be looking at image models in addition to LLM-based edit models (I'm biased as I left figma to start a image-mode-based UI design tool) as I find they're more capable in this area.