Knives Out was sublime

I wouldn't go that far, but I see what you're saying.  A great cast that mostly does nothing, and a whodunnit that tells you everything that happened at the beginning of the film.  The only 'twist' is obvious from the moment that character becomes involved with the central protagonist.  And it's fine if you're going to make your film a commentary on immigration, but don't be so lazy as to insert a conversation where the characters literally argue about Trump and his stance on immigration.  Trust your audience, don't insult them by beating them over the head with the already obvious subtext.