I've always found Terran's ability to draw the game by floating away their buildings a very unsatisfying way for the game to end. And one that is without parallel for the other races.
I'm suggesting a very simple fix, Terran buildings take VERY LITTLE damage while floating, something along the line of a single HP per second. Meaning a command center would take over twenty minutes to die. But it would eventually die, making float away stalemate not viable. Maybe even give a certain grace period, having the damage only start after a few minutes floating.
Would like to hear your thoughts?