I agree, it doesn't look as good with the wings that thin. They just look too brittle right now. If it was a space vehicle, then it could be as thick as you want, but it looks like there's an air intake which suggests that it's mainly for air. That said, my brain does tell me that the original wings are a little too thick. Perhaps making the wings just a little bit thinner than the original but not as thin as you have now? Some older aircrafts did have some thicker wings (at least at the thickest point) and sometimes you just have to go with what looks COOL haha.
My design has some pretty thick wings, much more so than yours but it's primarily a spacecraft so hopefully I can get away with it. I think yours looks way more cool than mine though. Your design is totally awesome looking, good job.
Don't be satisfied with what you can do but rather strive to do the things you can't do!