it did, the faces still looked weird and I easily recognized it as Kobayashi's work.
Gurren's just as artfaggy as kemonozume and both switch art styles regularly. Both were rarely outsourced to talentless korean sweatshop workers so every Gainax/Madhouse animator could use their own style for each scene.
that's why you have around 7 Simon designs in the final episode. His look changes from bishie to Go Nagai-styled in a matter of minutes.