This looks very interesting indeed. :) I've got a few ideas that I'm waffling between. Hopefully, the answers to these questions shall help me make a decision. 

When you mention only accepting a certain number of one race, is that counting accepted characters, or meaning slots still open? (two of my thoughts are Uialien... so that'd almost solve the waffling if there's no more space for one)

Are you expecting that the characters will wind up as one group working together, whether or not their final goal is the same? Or two separate groups: one for and one against the High King? Or just if one character meets another they might team up if they feel like it?

Do slaves, or forced labour, exist outside of Eriston?

What's the technological level? (I'm assuming late medieval) Does it vary between races? (I'm assuming yes)

Can we get a rough picture of the layout of the nations? Map or description, just which ones border which other ones.