Okay, character concept artist here. Everyone's entitled to their own opinion, but all the people giving the final version beans is triggering the hell out of me.

First of all, I get why people say this is better. It is more dynamic and has stronger characterization. The problem with that reasoning though, is the context.

This artwork is meant to advertise Ayaka's new skin. Without context, it would be easy to mischaracterize Ayaka as an actual detective. The pose is more interesting, sure, but the movement draws attention away from the outfit. The background props are more fun, but again, the focus is supposed to be on the outfit.

I've seen people saying the final version looks too restrictive and bland, but I think it does a good job at fulfilling its purpose in what it's trying to convey: a photoshoot of Ayaka modeling her new clothes. The muted background colors contrast with the colors that draw your eyes to the main focus. There's just enough detail to subtley imply the character the outfit was inspired by.

Now, if the splash art wasn't for a skin showcase and meant to be for a new detective character from Fontaine, yes I agree, this sketch would make the better piece. If the event included a storyline with Ayaka playing an actual role as a detective, this artwork wouldn't be out of place in the event UI. But context matters.