Yes, this series is a bit cruel, which is only realistic since it's set in early 1900 (and before). A show must be able to show topics like racism and savagery without people shouting "it's a racist show!" like one person did here. It has nothing to do with racism. The whites are not portrayed in a very favorable light at all many times, far from it.
The pacing is slow compared to more "actioney" shows like Hell on Wheels. It has a main and a secondary plot, both of which are very enjoyable. So far it does not contain any cheap nudity or such, which i think is welcome.
It's leaning far more towards realism than being over the top - everything from clothing to language e.g the native Americans speak their own language. So if you're expecting Xena in Texas, well, you'll be disappointed ;)
Like always I really enjoyed Zahn McClarnon's performance, great actor with such great presence.
Looking forward to see more.
