Sakamoto's interview from the japanese youtube channel is available translated on the nintendo UK channel:
https://www.youtube.com/watch?v=9BCPx2SX7Hk
So, one actual gameplay element that wasn't explicitly told during the E3 presentation:
You can actually move and shoot at the same time. But if you hold the L button, you can use the direction stick to shoot at 360° while staying in place.