Don't forget, after your opponent takes an action and marshals a kingsroad, you get an action to kneel the kingsroad with shipwright before the opponent gets to do an action to kneel and spend it.

The shipwright is excellent for keeping an enemy from being able to hit the threshold to play their 6-7 gold main characters early game if they're trying to use something other than A Noble Cause (initiative 0 and no combat effect) or Marching Orders (initiative 3 and stops them from making any progress at all getting locations onto the board or using any events that turn)

A perma-knelt kingsroad with an aggressive opener from the enemy (heads on spikes) occasionally even results in the enemy clogging his own hand with 2-3 copies of Robert / Euron / Daenerys after drawing 2-4 cards (2 minimum, 4 with a good draw location.)
The opponent's obviously not gonna discard his super character to reserve, he'd rather get rid of 2 or 3 weak events.
Then next turn the opponent does economy (A Noble Cause / Marching Orders) to try and get his immortal duped super character down and you Heads on Spikes killing all copies of that too-expensive character before the marshalling phase even arrives. You even get to be first player again because economy plots are the slowest.
 

All of this could have been prevented for the enemy had there not been a Shipwright on board to hurt his rush economy.

Bonus: he's got Ironborn trait so he can kneel a location during marshal, soak a claim in challenges, then be brought back to life by Damphair during the domination phase for free. An extra bit of usefulness.

 

Don't forget, after your opponent takes an action and marshals a kingsroad, you get an action to kneel the kingsroad with shipwright before the opponent gets to do an action to kneel and spend it.

But this would only work if I am first player right? If my opponent is first player, he would always take first action including the action of marshalling the kingsroad and also activating its effect.

No. You trade actions back and forth. In the Marshaling phase, the active player may Marshal a card as an action. Therefore, Marshaling the card is the player's action. Marshaling the card, then activating the effect would be taking two actions in a row for any player, which, of course, you can't do.

Also, he completely shuts down Ghaston Grey, which is the #1 most powerful Martell card from my experience.

A cannot-be-saved return-to-hand that discards all dupes and sends equipment back to hand is monstrously good against 5-7 gold characters that 2.0 is centered around.
 

As Ghaston is unique, Shipwright can keep the only copy on board permanently tapped out so you can keep your assault going with Euron / Asha / Theon / Balon which all benefit from being attacker, not defender.

Ghaston, The Wall, The Red Keep, Highgarden, Sunspear, Plaza of Punishment...you're not exactly looking at edge cases here.

Well, "The Wall" is untouchable, as it costs 4. The Plaza/Higharden/Red Keep are only within reach if you are the first player - which is fine, of course, but not guaranteed.

This card is great, but could you just clarify for me: there is only a real use in kneeling oponents locations that have a kneel effect yes? Kneeling a location that doesn't have a kneel effect , does nothing right? For instance a knelt Iron Throne would still give it's dominance bonus. Similarly wanted to ask(and sorry for going a little off topic) but if a character is knelt, it's card effects still count right? Unless they require a kneeling action to use them/

Correct, if the location's action does not require kneeling, it does not affect its action.

This card is great, but could you just clarify for me: there is only a real use in kneeling oponents locations that have a kneel effect yes? Kneeling a location that doesn't have a kneel effect , does nothing right? For instance a knelt Iron Throne would still give it's dominance bonus. Similarly wanted to ask(and sorry for going a little off topic) but if a character is knelt, it's card effects still count right? Unless they require a kneeling action to use them/