Quite a cool model indeed.
Now since it isn't just armoured banshee, but a lich queen, how about adding some more frost to her? There are icicles on many armours throughout Reforged models.
I think the concept of this model is cool enough to allow for a larger file size, so for example retextures of the dress for more cold feel and addition of frost auras etc.
It's just ideas, but the model has the potential to be extremely epic.