Turn the cave into 4 territories. The two paths leading from each end, with the center being the giant pool-like-thing. Also, make the yellow area between the cave and gray neutral and have it able to attack each side.
Right now, Massachusetts looks too hard to defend for only a bonus of five...I suggest adding some impassable boundaries to help make Massachusetts easier to defend. It has six border "countries"... I'm pretty sure there are some rivers you could use to make it more balanced.
Draft 2 Beta" (Drawn in tentative geographic borders, not final graphics or borders, they will come with the official 2nd draft)
http://img207.imageshack.us/img207/3759/untitledcopy2amresizete9.jpg