Don't pay any attention to extra contact point/MTX gimmicks. The benefits are debatable and the hassle of tuning them isn't worth it IMO. A full, dialed in straight edge is what you're looking for.
Benefits are debatable?
I don't even know where to start with this...
Rather that going on a rant, I'll just say that there is a reason you use a serrated bread knife on crusty bread and not a straight edge. HOWEVER, if you sharpen your knives all the time, you will be fine, but unless you are an iron chef, that doesn't happen, so you use a serrated knife.
Same with boards... most people are going to take their board to get tuned once or twice a season and that is it. That is where the magnatraction (MTX) shines because it works well even when the edges get dulled up a bit.
In fact, this is why I think magnatraction works better than most other brands grip tech. From my experience, MTX/BTX boards still have good hold even when they haven't been sharpened. Other brands I have ridden will get noticeably less grippy at the end of the season.
As for tuning being more difficult... there is not a single thing you would do differently, except on MTX boards where you would simply need a shorter file. That's it. If you freehand it like a boss, than you just adjust the file angle to get in-between the waves. Extremely simple. Not to mention the troughs in the wave pattern will be much sharper anyways since they are partially protected by the peaks.
OP, you asked for female specific, ice gripping snowboards. I again will say Roxy or GNU and add in the Niche Minx snowboard... all very eco friendly brands as well.