It's true that these games all are sort of showcases for the Cryengine. Still it could become a fun game - we have to see about that although I'm not too much into that kind of shooter so I probably won't like it...
The engine upgrades look great although I don't think we'll see anything like the frog in the game. I guess it eats quite some performance and the level of detail isn't suitable for being all around the scene. It already is sad enough that e.g. the textures of that tesselated roots that are shown are very low in resolution. It even nearly looks like they put the additional geometry detail in there to hide that...