That was already debunked by Crytek themselves. In wireframe mode, there was no culling which meant you could see everything that was tessellated, including the ocean. Only uninformed people perpetuate the idea that Crysis 2 was "over tessellated."
Crysis 2 tessellation implementation is actually one of the best in any game..
You still have the most overly tesselated concrete walls I have ever seen in a video game. The point still stands.