I guess my only concern is whether this gives us enough time to adequately develop everything. Essentially, we have about 9000 years of history with which to establish the gods, their natures, their understanding (or lack thereof) of their existence, the actual creation of the world, the creation of the races, the creation of the avatars, and all of the history and culture of the worlds. Now, the fact that the gods' vague memories gives them a potential running start helps there, but in fantasy terms, it's not a great deal of time to go one.
I actually tend to lean more towards less than 9000 years since I imagine there was a fallow period after the destruction.
The gods coming into being was essentially instantaneous after the aether had enough time to permeate with the echoes.
A few hundred years from inception to pulling the world together, and then followed almost immediately by the creation of the races. Since the races didn't evolve into that state, we get a jump start on that as well.
The races have a running history before the avatars come into play too, so there's no worry about having to take time OUT for that.
Okay, then! As long as the timeline isn't a problem for anyone, I think we should be golden, at least on that front.
So then, what do we have in terms of the races. So far, Moonfolk in blue, Goblins in red, Satyrs in green, and potentially Jackalfolk in black. Is it too "on-the-nose" to have dogfolk in black and catfolk in white? If so, I think kithkin are a potential fifth race, since we're not trampling too much on Lorwyn yet.