Why does a designer who can code scare you? It's a good thing. I'm a designer that works in code and it often makes my relationship with devs a lot smoother. I understand limitations, can reduce dev time significantly, and together, we share strengths producing a wonderful interface.

The design then pass off flow sucks. It puts too much emphasis on ornament and not enough on functionality. As a designer, understanding how it's implemented and why improves your work significantly.