From what I can gather, the main features are an improved HDRI implementation, adding a simplified option to materials and removing the cloth room.

It doesn't feel like much of a new version (it even has less than Poser 13 now that the cloth room has gone) but am I missing something?

I have a lot of nostalgia for Poser, but it's becoming hard to justify the upgrade cost each time, especially when they are removing features and Daz Studio is free.