Famitsu.com has posted a preview to their E3 2015 interview with Tetsuya Nomura, director of the Kingdom Hearts series. This part of the interview discusses some of the exciting gameplay in Kingdom Hearts III. You can read the part concerning Kingdom Hearts III below, which has been translated by goldpanner. The full interview will be included in the next issue of Famitsu Weekly.
The Keyblade Transformation Gameplay in KHIII
--- Despite the great number of enemies and all the special effects happening, the movement in the battle scenes in the trailer was so smooth, not jerky at all.
Nomura: For this title we are implementing free running, charging up walls and such, so Sora's mobility isn't ordinary (laughs). Most things can be overcome with jumping and free running, and as in previous games there are of course abilities such as Glide that you can unlock as you go along.
---As equally eye-catching as Attraction Flow were the Keyblade transformations. Despite gaining a befitting power from the Mark of Mastery exam, can Sora really command such amazing transformations all of a sudden?
Nomura: I can tell you all about that. Game-wise, it's possible from early on. However, each individual Keyblade has a different way of transforming. Basically, it's possible to get the option to make your Keyblade change shape once you complete specific requirements during battle. Then, the way it actually works is that transforming a Keyblade will change it into a specific form, such as the chariot from the trailer, and you use the abilities of that form.