Why it's taking so long?
It's because you don't want to do?
Or just making new things to the mod?

Creator of EnderIO you need to awnser this questions

"Status for the update to 1.11.2: Time spent: ~180 hours. Updated: ~30%. Stop nagging us, or we might notice we know ways to spend our time doing things that are more enjoyable." Surprised they havent deleted your post yet