Perhaps it doesn't have to be an exact 2-1 ratio of noobs to vets if more vets want to play.  But perhaps if the vets have a higher ratio than that, then noobs should get to pick all their races first (like Ashdod) 
 
Just a thought.
Map two looked OK (not sure about the caves and tunnels though).  I think 3 would be OK too, or was it 4? (the one with the surrounding ocean), as long as the Noob team gets Shinuyama 
