There was less emotion overall cause dean and sam had no emotional connection to the leviathan at all, which is the sam as its been all season so i wasnt really bothered.
And at the end, well i think everone was trying to figure out wtf was going on.Though i'd have have been happy if dean had thrown a glance around and asked if sam was with them too.

I'm semi-hopeful maybe? I might just be deluding myself. But this gives sam the chance to really interact with characters other than dean (Got no clue who, since most of em are dead), which he hasn't been doing alot of this season.
And maybe he'll learn from the demon blood fiasco and go about this in a different way, and triumphantly bust dean out of purgatory and there can be manly hugs everywhere.