Once the enemy team triple cap’s you, a timer starts, after 2 or more minutes some new UNSC boss spawns outside the base that only targets the enemy team. Meaning they can be distracted for a while and the trapped team can either use it as a means to fight back or sneak off and capture another base. This will also add a new and interesting mechanic for teams that triple cap to win and not to farm, as it gives them a sense of urgency.
Other solutions could be to add more spawn points around the base or drop Req weapon ordinances where the pelican’s initially drop you off on the start of a match. (wouldn’t work on Apex)
Another solution that I’ve seen on other parts of this forum would be to add in a surrender/self destruct core function. One player might initiate the self destruct and then an option would pop up for the rest of the team to vote on the D-pad. I think it should award less reqs for both teams, so that the attackers would try to actually attack and not farm, and the defenders wouldn’t surrender if the enemy team is actually attacking like they should.