This game was made increadibly faithful to the original. The game also suffers from thev2nd game syndrone that most ninty games have, qhich is the reason its so wierd. That said most of the new mechanics won't carry over. Large amount of supports, triangle, playable avatar (seriously how alm and celica was portrayed maked me wish for an avatar) and pair ups will probably be back by the next game.
That said fully VA'd dialogue should return which is going to be just awesome.