In a lot of Capture the Flag games, I've noticed that flags are almost immediately re-captured once they are returned to base after fragging the player with the base's flag, meaning that unless you deliberately camp the base with the opponent's flag, there's a good chance that it will just get recaptured before someone on your team can score and progress the match.

This feature would add a (very) small cooldown timer where a team's flag, for a very, very short amount of time, cannot be instantly re-captured until the timer expires, giving flag holders near their base but not directly ontop a chance to score.