The fact that you can create your own character and interact with other characters from the franchise is already awesome on it's own.
Start the game by finding out you are the hope for humanity and save a girl who will become one of your closest friends? Not bad.
The Descender removing the Gilgulim nodes draining their world of mana. Better still, the first time around, they have no clue how they managed to do it!
Radiant Mythology 2
The opening animation was badass, even the Descender was kicking ass.
You no longer need to have high affinity in order to recruit party members. Thank you!
Mystic Artes will now hit the enemy even if you are away from them. That shouldn't had been a thing in the the first game.
Kanonno Earhart is given her own Mystic Arte, which became a staple for the Kanonnos.
Radiant Mythology 3
Character duels will require you to fight solo, with an awesome battle theme from their respective game.
You are allowed to change which music will play in what situation e.g. battle, boss, final boss etc.
Extra dungeons and extra bosses.
You can have all of the three Kanonnos in your party! Love Beat!