So far Kislev with its 19 units is the smallest roster at launch of the entire trilogy. I expected 2-3 units we haven't seen but no, the only unit we didn't know about was the Dervishes and then there is the Armoured Kossars which everyone thought they were a variant of the Tzar Guard as they literally have the same model with different weapons.
Kislev being a minor race was a good opportunity to really flesh out the roster but I don't know, it just feels a bit weak. There was a lot of opportunities to make some really creative units and I feel like these opportunities have been missed. Don't get me wrong though I'm not saying the roster is bad, I'm just saying that it could have been better and seeing how small the roster is gets me a bit worried about the other races.