Once he gets to the Resistance outpost I suspect he might calm down a bit what with the hunter chopper gun giving his boat genuine firepower. Once he makes it to Black Mesa East, I'd be stunned if he *didn't* calm down, especially after Eli says that Gordon is getting back into a lab coat. I can see how Freeman's attitude lately is not everyone's cup of tea, but I feel like it's totally warranted. That said, I kinda would prefer less yelling.
Basically, once Freeman gets into a situation where he can actually calm down for a while after having been introduced to the state of the world, I think we'll see more of the spirit from season 1 return.
I'm looking forward most to the episodic games (gonna take a while, lol) considering there's so much more proper character interaction/dialogue in those. Ross can work really damn well off dialogue from NPCs (that argument with the 3 scientists trapped near the prototype cheese slicer comes to mind, as well as the talk with the guard who leads him to the armory).
And in regards to this episode itself, I thought it was fine. Nothing mindblowing but still decent overall.