Most HBO shows don't really go for big action finales, big events often happen in the penultimate episodes, like in The Wire, Stringer Bell's death happened with 1 ep to go in Season 3, it was the same with Omar in Season 5. In the Sopranos, it was the same. In the final season, the last episode was loose ends, hell, Christopher died with like 5 episodes to go.
I think all we can really say Twigg is that there will be conclusions to these stories, and that action is coming.
And, come on, Dragons are awesome. No matter how realistic this show can be, it is still a fantasy series.