My favorite type of real life group rides are those with sprint points where people go all out and then reform in the group. It would great if some or all of the pace partners supported this.
At a minimum, when approaching a sprint or KOM disable the distance for the pace partner so people can sprint and then wait for the group to catch up and pick up where they left off. More exciting ideas might be additional sprint points only for pace partners or ones that show up at random which might simulate random attacks in a race.