I mean I assume they plan to just cut grouch after, right? Scruff isn't a fan, Rust and Pika now won't be fans give Grouch targeted them and Leon isn't going to do anything, nor are they aren't. Telling grouch just opens up an idol play. If they merge after this Grouch and Lucy are just the bottom of the game with little counter-play, perhaps being protected by Poirot for a little bit. Of course that changes if Cheddar idols but I'm not surprised that no one has told.