New side quests for a couple of Waifumon.
A huge new city to explore. [Roughly 10 times the size of Eclipse City] (Though there isn't too much to do yet, so I recommend players familiarize themselves with the terrain first.)

Nymphlora is now available to obtain through an event.
A lot of new sprites (for the new city) as well as NPCs, etc.
New function through Gardevoir. If she has the move 'Psychic', you can use it to check the affection values of your human romance partners. That way, its easier to keep track of the values through Tramme's guide/walkthrough.