I checked out Jury Duty, the performances are great and definitely has some funny moments.
Regarding the main dude, they stretch the credability beyond believable, but the actors still make the jokes funny.
What I mean by that is they have the lead guy keep acting clueless, like oh my all this crazy stuff just randomly keeps happening...
Acting like he has no idea that reality tv producers fuck with shit and encourage shenanigans, playing dumb a bit too heavily, reality tv has been around for decades, everyone knows the drama is upsold. I am willing to accept that he believes some of the actors are real people, but unwilling to accept that he is so dumb he thinks the massive chaos around him is all completely natural and a normal part of the jury system. They overplay their hand basically, having him act completely clueless, still funny though, like i said.
Now that I've seen the show I'd say it's different than murderville since the celebrities on muderville are clearly aware everyone else is acting, but they still navigate the circumstances. It's sorta like watching a celebrity play an elaborite murder mystery show, and the detective/host Will Arnett does a fantastic job.
A closer show to Jury Duty would probably be The Rehearsal, love that nathan fielder sense of humor and the way he messes with people.