A few hours ago i was playing BTB with some friends and we were tied 2/2, and when the last power seeds dropped they glitched out of the map and the last round turned into a weird Capture the Flag game, since we were forced to steal 2 power seeds from the enemy and they only had to steal one we had a lot of pressure and we ended up losing the game.
It was really fun and i wish it was a feature: if both teams are tied 2/2 the only way to win is to steal seeds from your enemy, kinda like an objective mode that turns into a different objective mode, it seems like an interesting experiment like Halo Reach Invasion.