Cowl needs the most work. The hood/helmet combo didn't quite work here. They should take a cue from Cap's AoU costume or the Nightwing costume someone posted from Young Justice. They both have a collar/turtle neck that works better.
I like the costume in motion, same as TDK, but they both have the same issues with the cowl and looking a bit weird in stills.
My only major gripe is the suit's build makes zero sense in the context of the show. He wanted something similar to Fisk's armor which was thin and layered between the materials of his coat. It offered protection from slashes and I think Fisk was directly stabbed as well, not sure, but going by this, the DD suit should be more or less like he was already wearing, just protective. I'll have to watch the scene in the shop again, but it doesn't seem like he instructed the guy to make it super protective.
As for the cowl, they need to go thinner because it was too thick. Like use a lucha mask, Kane mask or a few movie masks as an idea for how to thin it out.