Marines new outfit is fine, I see a lot of reused resources, like the coat looks similar to Chloe's jacket with Ririka's texture, the top of her camisole dress thing looks suspiciously like Koyori's swimsuit top, shes got Korone's hairband thing,a hairstyle that looks similar to Pekora's,a hairstyle that looks similar to Aquas,and a hair style that looks similar to Noel's, and you know what, I think this is fine, she probably personally thought those parts were cute and made a mashup of them or something. I like the little ichimi teddy bear she now has too.
What's fucking bad is the rigging of that outfit, it makes her tits sag a touch more than they should, and those crotch bones were bouncing around like they were made out of jello.
Just a touch up on that rigging would make the outfit like 100% better, but it probably wont happen, and we probably wont see her crotch again anyway.