You're a Hellsing fan too, Uzo? 
Damn straight.
And I do agree with whats being said here. Shanoa was a step in the right direction, though I can see how the Glyph system could be interpreted as "an excuse for a woman to wield 'real' weapons". I really did like Shanoa though. She had class and wasn't afraid to beat down the undead, all while sporting a really hot look. Even her voice was confident and stood out. I really enjoyed playing as her.
I do not however believe that IGA is sexist. Legends being booted from canon makes sense in that it defies several long standing canon facts. Not because Sonia is a woman. In general though, I think IGA is just trying to make things a little more close to real world standards for the time periods. That's not to say that there have not been exceptions, but it is a general guideline of the time periods used. As evidence of this, Shanoa, Charlotte, and Yoko come from a later time period where it's a bit more acceptable.
Curse of Darkness was a missed opportunity though, in my opinion. Some women of the era turned to the dark arts as a form of social relief. Within those circles they had more freedom and power than society would allow them normally. Hector could have EASILY been a woman who joined Dracula's dark arts as a social escape.
Even then, mage girls don't have to be weak and timid. You can still pull off a powerful and badass mage girl. It's really more how it's presented than the powers they wield.
In general, I can see why things have gone the way they have, but I think with a little creativity and clever writing you can keep this concept and still introduce strong female leads.