There are probably only 1/2 dozen spots where the hammerheads like to play on, during that ride. I’d say let them play, but just make sure to re-group afterwards. Other than that, whoever is the ride leader for the ride should dictate a tolerable pace for the entire group for most of the route. You can also make sure someone in the team watches for and stays with the slower riders to make sure they are ok. A no-drop ride doesn’t need to be a slow ride the entire time; The “D Ride” is a fun mix of “fast at times” and also a “social relaxed” ride, and I don’t think it needs to be exclusively one or the other. Keep it tranquilo!