I don't like this concept either. It feels odd that game is over even if half of your party is still around doing just fine.
It might have something to do with scripting.
(for instance some dialogues trigger automatically between main heroes and other characters, and a crash might occur if both your main heroes are dead at that point.
But I agree that your companions should be allowed to continue fighting provided at least one main hero is ressurrected before the combat is over.
Last edited by Hugo; 29/10/15 01:08 PM. Reason: minor spelling