Kirsi and Eliza's pictures (including the companion shots) are hands down the best in terms of drawing power and selling the clothes and brand image.
I think that the picture of Karen is one of the best pictures that I have ever seen of her and it would be even better if that back fur was 'shopped out, but it (including the companion photo) does not make me want to buy Balenciaga. I feel similarly about Freja's picture, although the companion picture does a better job at selling the clothes.
If I include the companion shots, then Meghan and Stella's shots are kinda lacking, especially for an ad campaign, however the solo shots are compelling and on their own may work from a brand image standpoint, but the clothes selected are better suited for a runway or an editorial.
Meisel and / or the folks at Balenciaga seem to like the gawky/ awkward aesthetic. Even though many of the models featured are rather green, I think that a lot of the schlumpiness we are seeing may have been art directed.