I’ve played OoT MQ on both the N64 and 3DS, the only differences is that the map is mirrored from the original game & the puzzles are different, they become more cryptic and less obvious (hidden switches behind walls you can’t see, I remember hitting a wall triggering a switch opening a door when I was in the water temple). Have you played MQ on the previous remake (3DS) and original (N64)? If so, is it harder than the original game?
So far it looks like everything shown in the trailer is directly pulled from the original version. The few puzzles and temple elements I recall seeing were ones I explicitly remember from the 1998 game.
My guess is that they may have added a little bit of extra content in terms of side quests or collectibles, but the vanilla experience is largely preserved.