Since games can occasionally become very long, and people have lives, I suggest this mode.
It spawns a control point at the center of the map, controlling the point gives the controlling team points in such a way that if a team has been in control for a total of 15 mins, it wins. Meaning, that any such match would last at most 30 mins (+ tiny amount of time before a team gets a unit there in the beginning [or give control time to all teams until a unit gets there to enforce 30 mins]).
Timer could be changed to any number of mins.