I'm nearly to the last three dungeons, so I think I can speak up.
First off, those that are making fun of the graphics are barking up the wrong tree.
I think they were going for the original character design art, which really works, but it could be better if they'd improved expressions.
I will NOT deny that the PS4/phys version is a little crashy. Thank heaven for autosave, which means you don't lose more than a minute if that. It autosaves every time you zone, and that has saved me at least twice. (I'd like to ask PS4 owners who have this what model PS4 you run; maybe we can help Square run this down.)
The English voices are on point, and really hammer home the point that the sprite (Popoi) is a BOY. He always has been, it was a minor translation issue. Just if you're leveling spells, turn the voices off temporarily. They can drive you batty, then.
I like the stopping at the inn sequences a lot, those are fun. ^^
I don't mind the music changes as much as some, but yeah, if you don't like the remixed music, you have the option to use the original. Do it.
Anyway been having a blast; this is the first time I've really owned a copy of Secret of Mana that didn't have a gamebreaker bug (the iOS version had a gamebreaker bug; if it crashed, you'd have to reinstall the game..and LOSE YOUR SAVE, ugh. that's why my original clear on it was on a ROM). Also keep in mind; the mechanics are basically UNCHANGED from the SNES other than I can't seem to get chainspelling to work, but that's a minor quibble with me, since I have been able to beat bosses without it and I wasn't too good at that anyway. (I think they lost points on reviews for that.)
It took me well into the game to notice this, but they added a nice touch with the PS4 controller. The light on the back changes depending on which chara you are controlling. Pink for the girl, blue for the boy, and green for the sprite. I think I'd of noticed it quicker if I had more than one controller; they proly did that to identify who is who with controllers. ^^ (I am NOT paying 50-60 bucks just so I can have one of my siblings play w/me for one game. No, no no!) Also they finally put the canon names as the default names, which I appreciate. (Randi, Primm, and Popoi; I think this is the first English version to show those names.)
All and all, I've been having a rockin' fun time with this. If you liked the original, you might like this remake. If you hated the original, this will not change your mind one bit. Just make sure to loosen the nostalgia goggles a bit and come at this with a open mind. Oh and switch the voices off when you're leveling spells. Hearing Popoi call out for Salamado for the 200th time gets real old real fast.