Yea, throwing a new mechanic at players during something conclusive seems like an I Wanna Be The Guy kinda masocore move.
I mean it can go be super successful (or successfully unsuccessful) but the potential for bitterness about getting completely blindsided seems too high to me.
Omg the McDonald’s Angus burgers were FIRE. I ate wayyyy too many of the Bacon and Cheese ones and occasionally the Mushroom. I even loved they got put in their boxes with the paper burger holders LIKE EVERY BURGER FUCKING SHOULD.