Okay I've read the last two of these things and have a question for you Yora.
What exactly are you doing here? These things seem to start with a Campaign Setting but grow and gross until you need totally new mechanics and gameplay.
I think you may want to pick a game mechanic set and then set some limmits on how far you are willing to stretch things. Adding a class/station mechanic seems easy enough. Eberron added action points, Ravenloft had its Dark Powers checks. But really how much farther do you want to go? Playable and done is bette than unfinished, hyper complex, and near perfect.
Good Luck