What I find most interesting is that all these designs for Marie Rose are so different between them that are very likely tied to an early stage of her creation: apparently TN explored ideas to make of the new character an oriental martial artist, a more sporty one as Hitomi, or what seems to be a Japanese schoolgirl. On the bottom we can also see that white outfit that imo it would have ended to appear even more "Japanese" than the ultimate gothic fashion, considering that seems taken directly from some uniform of fantasy anime (not like my Ein's design xD). Jokes aside I suppose that its story is when TN started to think to affiliate the new girl with the fashionable Helena.
In the ending they seem interesting, but the character coming out from them it would have been much more different from the Marie Rose that we know, so I'm not sure if we can actually talk of effective different costume designs for her, rather of different "characters designs". For example the white outfit appears give to me the idea of a character more mature than youngster (contrarily to the "kung fu" or "sport" uniform), while the design on the left seems to push her more toward the anime realm than the gothic one (the latter it's not related only to a tv trope).
In the end I would have liked the white outfit version, but honestly I'm satisfied of the final outcome considering what TN showned us so far. I just hope to see in DoA6 an increased relevance to the description of the character in the rest of her standard outfits and characterization/interactions with others.
PS: I'm also curious to see if we will see fulfilled what seems to be the idea of her rivalty with Ayane for Eliot's heart... XD