It would be nice to draw out the match instead of fireteams trying to kill the predator right away. Add a game mode where killing them early on gives predators their self-destruct with an increased radius and cannot be disarmed.
Then make the optional objective what fireteams need to successfully disarm the device. This would direct fireteams to focus on completing missions. Once it’s done they can head straight to the extraction, or be rewarded with the disarming tech to kill and retrieve the predator’s body.