I think the bit about compression may be missleading since iirc textures are uncompressed in gpu memory thus it doesn't change the added system requirement compared to the original upscaled files. Unless I'm mistaken about what you meant by that.
Now that being said, that mod would work great in conjunction with an option to bring planets showing in the battle background a bit closer.
Oh and if you were thinking about it, I have no issue if you want to make an addon that upscales the textures from my Unknown Skies mod too.