Hi, I know too much about Gust. Let's chat.
Like I said in the general video games thread this probably won't be a very good game. Gust has pretty much only ever made turn-based games and they don't really have the resources, experience, or staff to make the jump to making a competent action game. I don't ant to get too down on it before we've even seen any gameplay but I wouldn't get my hopes up beyond "tolerably mediocre".
They might actually deliver on the yuri though. Between how adventurous Gust can get in non-Atelier titles and how hard they're pushing the main characters from the very first info, I'm hopeful.
The visuals feel like they're by the Ar Nosurge team, which wouldn't be surprising since the main Atelier team is probably really busy. This game will probaby have a lot of the same problems Ar Nosurge does; improper emoting (i.e. characters with doofy smiles in serious scenes), stiff animations outside of combat, and dumb outfits. I'd like to see the game in motion before I make a real call on this front though.
They've said literally nothing about the musical staff yet AFAIK but it's Gust so it'll have cool music. I hope they do something different with the sound team here, though maybe not as extreme as letting Akiko Shikata make almost the entire Ciel Nosurge OST. Yu Shimoda hasn't been primary composer for a while, if ever, and mostly got excluded from Shallie, so a soundtrack primarily by him could be great. (Comedy option: Haruka Shimotsuki as sound director)