Your vision about the nomads.

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Nomads want their home back.
To do this they need to get rid of humanity.
In any way possible.

So yes, they are distinctly hostile since we are the invaders in their eyes. Much the same as how they are evil aliens in the eyes of many humans.

What I would like is some more development of the K'vosh. Nothing concrete, nothing properly explained. Just more tantalising hints or whisps of memories long gone.
Valhalla 1 for instance, Cardimine for instance, Sirius as a whole for instance.

Yes it is fantastic to have a long gone empire that is out of reach of our comprehension or knowledge but sometimes giving a hint here or there can be even better and give a slightly, even a tiny amount, fuller picture.

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Facilitating the rise of robotics since 0 A.D.