As with any card - your mileage may vary. I've used Wolfswood quite a bit and it'd a great supporting card. Nothing to build a deck around but a card I'm very rarely unhappy to see.
Just because you have issues with trait-themed decks doesn't mean the cards that support them are bad. In the case of Dothraki Sea, the release of Aggo may just be enough Dothraki to make it useful. Time will tell.
As for the Lanni Jumper deck - it's already powerful. Anyone who has been able to use The Hound more than once in a challenge phase can tell you that. Obviously the deck needs a solid core of stable characters to build around but the Ambush characters are the icing on the cake.
Yeah, I most definitely have issues.
I'm just surprised that Wolfswood ALREADY sees play prior to this pack. Slots are tight. I guess 3 gold to threaten Warm Rain is a decent represented threat too, though telegraphed due to lack of other ambush options. If the stars align...
As for the Lanni Jumper deck, nobody says the Hound is weak (and I wrote that I'm currently refining a tempo GJ Lion that may play him x3). What I can't stomach is 3x Hear Me Roar and 3x Never Bet (or whatever the numbers are) taking up non-set up card slots. At least Gold Cloaks can be set up even if awful then. In the spectrum of high variance to low variance decks, the Lanni Crossing version (so no Rose Bear mitigation with Tickler, Gregor and Bet) seems to be breaking the scale on high variance. My friend (SC winner so a decent player) played the Lanni Crossing jumper deck in testing and I won 3-0 with 3 different decks. So I wasn't impressed.
If we had Enemy Informer from 1E (kneel target when comes into play), then yes I'd start considering them. But whilst I appreciate that card advantage is often sacrificed for tempo, 2 cards for 1 challenge win seems a steep situational price for me. Unless you are playing with and against 2 claim when it's a wash.
As I said, I have issues. I have detailed my criticisms of the deck with the current pool. Its victory is to me emblematic of the high variance in the game.