SAY YES!!! (John Seed)
Nah, wouldn't add to my experience.
One of the things that let me down about Far Cry 5 is that it doesn't have 4 player co-op. Ghost Recon Wildlands and Breakpoint have the option already and fully customizable. If there is 4 player co-op that would be a huge selling point for me and my friends. Would you people want this feature too?