Since I do CGI Visual Effects for a living, and starships vfx as a hobby, I'll chime in. I have to agree with the OP, I'm disappointed in almost all of Discovery's exterior starship shots. There are a few in the Battle of Binary Stars that look great, but every episode after that has this weird shift in the image aesthetic. Colors way too constrasty and over saturated. The bussards glow like the sun. The highlights on the aztecs are far too bloomy/bright.
Pixomondo is one of the best VFX studios in the world, so it's not because of lack of talent. They could nail it. Someone in the production pipeline wants these shots to look the way they do. I say if you aren't going to stylize the live action footage, then don't stylize the CG either. Otherwise they don't go together.
In my work, I put photorealism as priority one. After I have hit that mark, THEN I worry about making it "beautiful." I did this flyby of the Shenzhou just as a little test of how I would do the shots if I worked on the show. I feel like it's realistic looking, but also works with the "look" of the rest of the show. I didn't add all the crazy blooms and saturated as hell colors.
I will say, one starship shot I thought Discovery NAILED was this close up of the Gagarin. It looks very real and natural.