This is an idea for CA would be nice to hear what they think, also everyone feel free to give your opinion.
When combat time comes to an end the map would start stretching in a circle from it's borders to the center. Every unit outside this circle is going to take considerably damage forcing the player who is running away to force the draw to fight.
Of course, the map is going to stretch slowly so no one falls behind because of their slowness (dwarfs for example).
Also, make possible with a vote system to prolong the combat (with no circle of death) or take the tie if BOTH players agree or (if in group) more of the 60% of the players vote it.