It would be possible to add unique mechanics for each of the 4 races.
Triton - the ability to breathe underwater and explore flooded caves.
Kor - the ability to climb steep cliffs and heal partners.
Verdan - improved stealth and theft skill.
Vedalken - the ability to collect additional mechanical arms that provide additional action points.
Water Breathing should also be give to Aquatic Elves, if they also become playable