So apparently the Xbox One manual leaked on SmartGlass.
LB - VATS
RB - Bash / Power Attack / [hold] for Grenade
LT - Aim / Block
RT - Attack Back - Toggle POV
Start - Pause
L - Move
L - [click] Sprint
R - Look
R - [click] Sneak
Y - Jump
B - Pipboy
X - Ready / Reload
A - Activate PAD - Favorites PAD + A - Select Favorite
To me it looks like they are making the game more in line with other popular FPS games. Which for me is a good thing for how the game plays... that is if this is a legit leak.