I never understood why people had trouble with the time management mechanics to the point of Gust throwing away that characteristic feature since Atelier Shallie. Atelier Rorona Plus was rather simple since you had a obligatory assignment every 3 months and you only wasted those precious days when changing maps outside or synthesizing items in your atelier. Granted, Atelier Totori was the hardest of the lot because the time window between objectives was much larger, but the map world was more linear, and (tell me if I'm wrong because it's been a long time I've played this) getting into fights and collecting items waste days too unlike in Rorona. Not to mention NG+ playthroughs made things easier since you got to keep some life-changing items you synthesized beforehand.
The Atelier DX present on Steam and Switch are basically the Plus versions previously released on Vita (minus the framedrops although that was hardly a dealbreaker), which were the PS3 base game plus all the DLCs in one package.