Please add that question about phantom/acrobat case in the Phantom article.
My interpretation is that thay can't be used as the acrobats as they are a different figure, such as the Big Meeple or the Ringmaster. All of them can be used in all cases as normal meeples except for acrobats. It would be too powerful imho. I hope HiG will rerelease this miniexpansion (maybe inside the Catapult reprint?) and it will be compatible with all editions so the Phantom will receive a new, wooden model.