I played Titanfall at Eurogamer but it wasn't running on xboxone it was pc with Xbox controllers.
Prsonally I've had no screen tear or any problems gamewise or graphical. There will be apparently 33 weapons in the full game. The smart pistol is bit more futuristis as well as an Arc Cannon (not in the beta).
I love how fast the game is but think the A.I needs ramping up a few lvls. Bit too easy pickings, not very rewarding for a kill. Game mechanics in though are superb.