He's just a concept artist.
Hmm...was hoping this would be a case like with FFIVDS, SNES IV - VI, or FFXIV ( I know he didnt do the design here, but the team got pretty close to adapting his original art for earlier enemies in 3D) where they at least tried to get as close as possible to his art for the main characters or enemies.
World design maybe?
Would be nice.