I just got Shards of the Throne Exp and played one game with it. Got to say - BRILLIANT EXPANSION
However the Trade III secondary ability seems pointless. With it you can break a trade agreement, but the primary ability lets everyone make agreements and instantly get trade goods for them. So whoevers agreement you break just remakes it and still get the goods. Have I missed the point somewhere or is the secondary ability just pointless.
If Im right Im instigating a house rule more in line with the old trade agreement rules.