I've just played that scenario here on PBF. And while I agree that it was a welcome change from combat heavy adventures, there were things in the settings that I found hard to believe.
1/Unknown people, with arms and armor, asking for a meeting with the ambassador in the midst of a social event... and entering the building with all their warlike stuff. No question from the guards. "Want to kill our main Chellish ambassador, mate? No problem! Come inside,it's cold tonight! Nice double handed axe, btw!"
2/same people roaming in the rooms and corridors, heavily armed, no question asked? No alarm raised?
3/Fight in a room: unless you're able to kill your opponent quietly in two rounds, why doesn't someone coming to check on what's happening IN A ROOM SUPPOSEDLY EMPTY?
4/No one in the Chellish embassy will see the difference after your Pathfinder passage (destroyed furniture, missing files..), no one will ever have a clue. So be creative and write "Cheliax stinks" with Turpentine everywhere on the walls.
It would have been better if the characters would have been limited to light armors and light 1H weapons (Sleight of hand to hide them)OR even no weapon/armor and a pure RP/skill/brain game without any combat.
But that is just my opinion.