Merci has been filling in great. He makes the most out of his minutes, but only during pass plays.
Watch him when the offense runs. He's sooooo aggressive ( why he's good on a pass rush) that he loses contain on a run. I think that is one reason the coaches are hesitant to give him more time. He will figure it out and be a good one.
Now somebody has to put a boot up CB and BR azzzz and get them going. Running out of games.