I see what you're saying, but I feel that there is plenty of variation - we have 10 sentient races, after all!I understand your reservations about adding more races to the setting. I just feel that it could do with a few more sentient races to add some variation. I certainly don't want to see 5 or 6 additional books of races like D&D/Pathfinder, but a half-dozen well developed species that could either be antagonists or possible allies as the adventurers explore Ravenlands or other areas would, in my opinion, be beneficial.Why do we need more races than presented in the book? I personally don't want the official setting to turn into some D&D clone. IMO, it has just the right amount of sentient races to feel like fantasy, yet still retain its own identity in the glut of published fantasy settings.True. Maybe a half-dozen additional races, but with a deeper culture to draw on and different factions within those races.
I like what I see of the setting so far, it's not that I don't like the races presented, but I just feel a few more would be good too.
But that's one of the benefits of getting an OGL - we can all tweak our games to suit our own tastes. There's nothing stopping you from creating your own additional Kin as playable (or non-playable) races. In fact, it looks pretty easy to do.