Every day I log into Ghosts on the PC, I see the number of players online dropping further and further. It's also impossible to get a game going on any other mode besides Domination and Team Deathmatch (shame, because I loved Ground War for having bigger, longer games).
Also, it seems like the report player feature does nothing. An obvious hacker said he'd been doing it for three months now and hasn't been stopped since. Not to mention you have some people who report anyone who just happens to have a good game.