I didnt read all the posts so I apologize if someone already said waht i am going to say lol, but I think the mousseline can taste like butter if its COLD….I never made the neoclassic…maybe its the same type of thing??
Also
Crumb coating….I hate doing it because i somehow always manage to get crumbs from the cake back into the BOWL!!!! Then, my top coat has crumbs in it anyways lol