As a comic book fan, I appreciate an artist who draws characters to their strengths. I like Michael Turner's style, for example, but would Superman and the Flash have the exact same body style? Or would Flash be sleeker, as befits a runner, while Supes' design would call for broader shoulders? I know it's hard to follow this policy in a live action show, but I had assumed they selected Gustin for his slim build and I don't feel this suit takes advantage of that.
Thoughts on the design? Overall, I think they got the color, cowl, and modern style correct.