Rank maps in Breakthrough

Only one I've played is Hourglass and to me it's a solid F.  The attackers get hosed by the rooftop capture point, and the defenders just get farmed by vehicles over and over and over and over and over again.  Plus the C sector where there's just one cap point ends up becoming a slideshow with all the explosions and sound and people in one small area.  AOW Conquest on these maps works because the 128 people are pretty spread out, almost too much so.  Breakthrough is the opposite and any area with a single capture point is just going to prove that 64v64 in a tiny area is a potential issue.