How about geographically defined teams?

[One Tin Soldier]

Thinking some more about the Iksar whom I somehow completely forgot in my original post.

Allowing the Iksar to join any of the three teams would solve the missing classes problem for the Faydwar team. It might also help to prevent the Freeport (dark team) from totally dominating Kunark if the lizards were split up. But it would be pretty rough for young Iksars starting out in the chaos of having three teams in one home city.

Alternatively the Iksar could simply be added to the Faydwar team. Roleplay excuse would be that the Faydwar alliance hired them as mercinaries or something like that. This would help prevent the Freeport team from dominating Kunark but it almost seems like the Faydwar team would be getting a bit too much now. Five races entirely for that team compared to the other teams getting three of their own and splitting humans.