So the new patch notes have been released for about a day now and being an avid Submarine Captain decided to compare the new changes. I extracted all the SS changes because my brain can't handle giant clusters of numbers. I've even added red and green colors to denote a nerf or buff. I'll paste the shortened link to the google document below. Everyone with the link can view it.

http://bit.ly/1F3eN05

So far I've come to the conclusion that the KM are worst in every category that they have competition in. As far as DP, Crit Factor, and Sight range go. They still have the best torpedoes. Speed was not compared in this graph due to it not being changed.