They shared the power (co-regents) - he wanted it alone - she wanted peace, buildings, wealth for her people, strengthen religion, she was too mighty - he wanted to conquer. Thutmosis lead quite a few conquests (that's what "real" heroes are made of, hm? <img src="/ubbthreads/images/graemlins/suspicion.gif" alt="" /> ) - wars are expensive.
To cut a long tale short: maybe the old tradition of interfering interests?
Kiya, wishing she could interview Hatschepsut
Remember, shortly before she was born, Ancient Egypt was devastated by the Hyksos - the country had suffered a lot.
But back to topic: As Carrie said already, there are a lot of female heroes - and we represent more than 50% of the world population - so, it's more than fair, if chars in a game are represented as female - human or non-human.
And as <img src="/ubbthreads/images/graemlins/riftrunner.gif" alt="" /> has this, I'm going to buy it for sure <img src="/ubbthreads/images/graemlins/biggrin.gif" alt="" />