It's easy to do unwearable sculptures, you can use almost ANY medium to create grotesque, fantastical shapes, textures, colors, etc., so that sort of "art" to me isn't terribly exciting because genuine art at galleries by artists is far more interesting than what I see on CdG runways, their metaphors and references aren't so "direct", and have more layers and meaning.
This is a bit Cirque du Soleil to be honest, eg plastic fantasia Little Red Riding Hood, etc.
For conceptual fashion collections, I much prefer Hussein Chalayan's previous collections, with their more sophisticated use of lasers, robot technology, etc., integrated, so it's not a matter of adhoc "stuff" put together.
What is disappointing about CdG this season is also that her current "wearable" umbrella collections are not offering anything new either, no interesting tailoring, prints, etc. The last of Rei's I liked was the collaged garments (blankets with jackets, scarves,etc.) collection which heralded the wave of spliced and collaged fashion, Marc Jacobs, Sacai, etc. Those to me are integrated art+fashion pieces. Art put on a walking model is something else altogether (mobile sculptures?), and then I will look at these more critically as I would generally appreciate art, and they then fail terribly for me as "bad art".
Strictly my own opinion of course.