New features in Etrian Odyssey IV include 3D monster models, unlocking special weapons through QR codes, and flying in a hot air balloon. Battle planer Satoshi Ebato made another tweak and while it appears subtle it will probably change how players plan battles against F.O.E.s.
You can switch characters from the front and back rows during fights without using any turns. Basically, this lets players swap characters out to the back row to protect them and bring melee fighters to the front row to deal more melee damage. Players can change the position of the characters a much as they want.
Etrian Odyssey IV comes out on July 5.