I don't hate armor either. I don't hate anything about this movie so far. Combat armor just doesn't look practical (neck area especially looks dangerous as hell) and feels like it was crafted from pieces of furniture or car parts... I don't know. It's OK. With a helmet it will probably look better. But so far it feels like it belongs to Mad Max, not Dune.
The best costume work is Atreides uniform. Stlillsuits are super-basic, rather unimaginative. But they look functional and it's probably enough if storytelling is good.
Robed Jessica looks too much like you know what.
Why Fremen wear those ugly drapes - I dunno. I hoped for something more culturally rich. Textured robes, capes, some variety in outfits... Just feels like a missed opportunity. But maybe within context of the movie it will feel more organic.