Dragon Quest XI S is going to include plenty of new content over the original PC and PS4 releases, such as solo adventures for all party members.
The Dragon Quest XI S Official Website has been recently updated with new information regarding these solo quests. According to the website, all party members will get their own adventure which will reveal new details on their personal stories. New characters will join them throughout their solo adventures.
The Nintendo Switch release will come with an optional 2D mode, which was only available in the Nintendo 3DS release, fully orchestrated field and battle music, a fast-forward option to speed up combat, Japanese and English voiceovers and more. The publisher has yet to decide if the additional content will be added to the PS4 and PC releases.
Even without the additional content, Dragon Quest XI is an excellent traditional JRPG well worthy of your time.