New features in the Remastered Edition include:

Online multiplayer for up to four players.
Play across different platforms with the cross-play function.
Transfer save data across platforms with the cross-progressive function (via).
Added challenging new post-game dungeons and bosses.
Added new variant character skins for each tribe.
Added new items to equip.
Newly recorded theme songs “Kaze no Ne” and “Hoshizukiyo” by Yae.
Newly recorded narration.
Newly recorded character voices.