So I finally completed everything on Isla Pena and moved on to Sorna, and I have to say that it is BY FAR the best thing I've found in the game. From the initial setup to the space and layout, I really love it. The only negative I can point to is that it makes no sense to have a mountain in the middle, as Sorna was a volcanic crater, with ridges all around it and a huge valley in the middle, so although I like the layout, it's a little disingenuous to call it Isla Sorna.