yeah, they're keeping things as close to the original as possible while also keeping in mind that the game is now in 3D and such, and according to the interview Ito is on board for new arrangements of the soundtrack.Going by the screenshots/short videos so far it looks like they use the map layouts from the original game verbatim, simply replacing the pixel art with 3D assets.
If they also keep the mechanics and actually improve the music (versus just using samples instead synth with no actual arrangement) I might prefer this "remake" to what was done in Sword of Mana.