Wow...
Ok let me add my two sense. I honestly believe both of you have presented plans that are way too complicated at least to start with, they are more like plans for your own site instead of a feature on RPG. Here's my lame idea:
Skip all the magic planning, the possible creatures, religions, dividing it up by skill level ooc and ic etc etc. It's too much. All of that is already available on this site and any other rp site...boring. You are trying to create a unique world/realm/environment where players can come at any time and find a story to pop into with out the bother of drumming up interest with individual plot ooc's or finding someone to play with.
Instead pick people...leaders that will be responsible for a specific realm..create a basic skeleton of whats in it. Thin cheesy example: Crystal Havens a beautiful city where angels and spirits tend to weary souls, is ruled by the great Goddess Hefra and the Sapphire stone blahblahblha details and description of the land... It will attract the interested characters and the mod or whatever could possibly control the Goddess character and help guide anyone who comes into the realm. They would not have to participate in every plot line but they could keep it in check if need be.
My point is, create the basic worlds/realms/planet and let the people create the lore for it and maybe a simple rule to keep in check is to use common sense as to what world you throw your character in. If the cyborg/android/ alien zombie wants to bust up pixie land with is turbo cannon he should be prepared to get his booty handed to him by the fierce Pixie Extermination Crew who blast him back to where he should be, render him powerless or kill him (meaning kick out that character for ruining the realm) Be creative peoples, either roll with the idiot or creatively kick him out. (with the freedom to create a new character...maybe a three strikes you're banned rule lol) The options are endless. So here is my sketch:
PW
a. news- rules announcements, contest winners etc
b. general CS
Havens(spirit)
a. special quest CS
b. ooc
c. ic
1. healing pool
2. forbidden love
3. the breech war (angels vs demons woohoo!)
4. etc
Underworld (demon)
a. special quest CS
b. ooc
c. ic
1. Lucifer's Disco (lol)
2. etc
Planet Hu'lech (space futuristic stuffs)
Dragon Mountain
Pixie Party Palace (ya i know, dumb titles but im just pulling this outta my a.ss)
random steam-punk title
random genre title
etc... more as interest develops.
Totally character driven. They add the areas. Example- if someone joins in and forms an alliance head quarters on Hu'lech he has just opened the door the other for players to create characters from other planets.
If a player comes along and puts a healing pool tended by virgin mermaids at the base of mount Blahblah in the Havens she has started an open plot line for anyone to dive in.
Make it character driven by creating an open world that obviously appeals to the different genres and throw a mod in charge of each one. Keep rules minimum. Period.
It's an idea.
My listing didn't work out right but you get the general picture.