To even compare COD and BF is silly. I have over 12 days on BF4 and about 8 1/2 days on COD and believe me you don't want the "region filter". Japanese, Chinese, French, Portuguese and UK are always joining nothing but US servers because they get a little bit of an advantage with lag compensation. So no I left BF4 to play COD Ghosts until they eliminate foreigners from joining US Servers all the time, COD doesn't need something like that going on over here as well.
I have said multiple times on other posts that the supposed "framerate drops" are caused by COD Ghosts trying to exceed the 60fps max limit placed on the PS4. So you aren't seeing "framerate drops" you are seeing incomplete frames or broken frames because the console has a limit placed on it right now. A real framerate drop is far less noticeable than what you see with the shuddering on this game. So until the day IW decides to lock the frames at 60fps max this will continue to happen over and over again.