The only thing that his striking has in common with Fedor's is that they both rely primarily on their hands and don't use a lot of kicks. Cormier's hands look pretty good but the top three guys that he has beat have all been BJJ guys who aren't known for their striking (Bigfoot, Monson, Barnett).
Jon Jones has beaten better strikers like Shogun, Rampage, Rashad and Machida.
Cormier's one of my favorite fighters out there now, but the last thing he needs to do is drop a bunch of weight and go after Jon Jones.