It looks fairly well planed. You should take it it to the next level and maybe start development on a mod, like the aether mod. It should maybe act as a proof of concept.
Unfortunately I don't have enough knowledge to do that.
One other thing, I see so many good realm additions and so little good realm mods. Maybe there should be some moding teams formed for making additional realms, and they could take suggestions? Like even going as far as to start a new section in the forums for it. I don't know, maybe I should start my own topic!
Unfortunately I don't have enough knowledge to do that.
I definitely would support this!