Cool photo. Cropping it ever so slightly to completely remove the person on the left would help focus the composition. The blue, pink and yellow lights are really interesting Emphasizing the lights by adding a gaussian blur filter could help bring a glowing luminosity to the lights and make the photo more captivating. I would be curious to see how increasing the blacks and shadows effect the photo - might give it more of a mood. It might also be nice to try turning down saturation and turn luminosity up.
It is a nice photo. I too like the texture. I think the junction box is totally fine - it adds some interest when looking closer at the photo, but does not catch the eye at a quick glance. The photo looks really dark to me. How does the histogram look? I feel like the photo needs to be at least a half stop up on exposure, or maybe try increasing whites and highlights. Does this photo have a red filter on it? If not, a red filter could make the sky more dramatic while maintaining a minimalist feel.