Azetbur's role is quite interesting where she could be this powerful, she could take the power in her own hands as chancellor but she had to do it in a trade off in becoming unpopular to her world. It could stressed throughout her reign as a trade off, she has these virtues, the tricky thing is for power. I was never a fan of the cartoon character of a Chancellor from TNG, and I'm surprised Gowron lasted that long, but for what it was it was okay.
The bar for me was set really high when Kor was introduced in Errand of Mercy; he presented himself as a ruthless, highly intelligent adversary. If Klingons were being ruled by leaders like Kor, then Gorkon must've been that way for a time and had to change his stance. For Azetbur, as Chancellor, the only way to reclaim her power is to be that tyrant in the eyes of Klingons in order to enforce change. Her reign might have been a rough road.