First off I think this tech comes to early.
Rebellion gives up to many of it's higher techs to early, late game you have nothing to look forward too.
Anyway, shouldnt Truce Amongst Rogues require you to have a envoy in the wells that this is effective?
Why have a ship that is a Diplomatic ship, and take it out of the treaty business?
Instead of just a switch in the tech tree, make it that you also need one of these ships in each well.
Ideas?