I did a 2k upscale of the textures using an online resource. In the editor, I took the original size via mipmap using the Kaiser filter (it seemed acceptable to me) and did not compress, so as not to lose quality, saving to DDS.
This is the optimal solution that I proposed to G0ldiel when it came to upscaling interface textures, so as not to bloat the size (which affects performance) and not to rework the (Shared).xdb files (losing compatibility with other mods) for the game to compress giant textures.
In the screenshot, before and after.