It does seem odd to create a 4K version of these, they were recorded in 1080p, it will just be wasted gigabytes
As far as I’m aware emanswfan is is upscaling to 4k then downscaling back to 1080p only to achive a particular effect with the grain. He’s not planning on actually releasing in 4k.
No matter what you do, you won’t be able to make the CGI look like practical effects or make the story and characters feel like the originals. The only consistent aesthetic connection between the two trilogies is John Williams’ score.
Well for people who actually really enjoy the prequals, it’s still worth it to try and make them look the best that they can!