I would not consider new races worth the effort.

Firstmost, they dont add anything to the gameplay of existing players. They only add a paid option.

Second, they require way too much work with refitting gear. It takes a long time refitting gear and having to do it with every single piece from a pile that only grows bigger makes the creating of a new race take longer.

World of Warcraft can add new races as they please with as big variations as they like because gear in WoW is just a texture on a naked model aside from shoulders, helmet and belt buckles. Blizzard does not care half as much about clipping on those models as SE does. This shortens the creation time significantly.