While I'm not entirely sold on where The Bureau: XCOM Declassified is headed, so far so good. We got an excellent, traditional turn-based title in Enemy Unknown, which has me more open to what 2K Marin is attempting to pull off here.
This trailer focuses on the Battle Focus ability that slows down real-time combat to the point where you can safely order agents around the battlefield. That is, until they get shot because you didn't fully plan out your move and, oh god, I'm so sorry. Gone forever.