D&D Next Playtest 3 - Asking "Why?"

We played a 2 1/2 hour session of Reclaiming Blingdenstone last night.  There was one combat encounter.  It was a tough one, and I'll go into why in a bit - but it was also right at the beginning of the session and relatively short.  Maybe 30 minutes all-in.  The rest of the session was pretty much all role-playing.  Which was AWESOME. The session started with a random event "ROUS" - giant