The textures seem a bit questionable. They're too polished and soapy. It would be better to move away from this style. Maybe you shouldn't rush this work and take your time? I'm not saying this because of potential competition, but because I want you to end up with a high-quality product. I'm sure you want that too.
In reality, 1920x1080 is like 2k, but it hasn't been officially recognized as such. On 4k, my textures slightly blur the details.