I was thinking it would be neat having a specialist that can get your troops across (soon to be) enemys lines without raising suspicion. So what about a specialist that makes your ship look to be a gift, avoids naval combat untill it hits a outpost where you supprise attack them. Could be a promotion for the double agent.

This sounds interesting but it definitely add more unpredictability to the game. However, if someone sees you have the trojan, maybe it would be quite obvious what actions you're taking.

I suppose we need some more details: Do you need to bring the Trojan with you or is it passive? Does it simply allow you to cancel a gift? What if someone attempts to receive the gift first by sending a driller at it, could it ruin your plans of ungifting?

Could be interesting. I'd probably say that the devs are less likely to add unpredictable specialists to the game instead of specialists with more predictable abilities. But this isn't completely unpredictable, it's similar to promoting to king. Just needs some more details.

I would like it if he was on the ship but hidden unless a enemy ship intercepts them. Maybe bonus damage if you land the sneak attack and bonus damage for the enemy if they intercept your drillers. I like your idea about canceling gifts aswell.

They have toyed with similar ideas in the past and they didn't work out working well. It sculpted the behavior of the players away from interacting with those objects.

I like the idea, but I don't know how to make it work and balance it with an opposing specialist/strategy.