I don't think this alone will turn COD around. What needs to happens is that the devs needs to get rid of the action hero mentality that has existed since MW2 (possibly MW but the counter there is the nuke scene). The OG COD's were all part of being a squad and feeling helpless in the wake of overwhelming odds, they were games you didn't win, they were games you survived (or didn't, thanks nuke scene). The modern COD's make you into an overpowered badass who can tear through hordes of minions unless you rack up the difficulty to veteran. Given that Sledgehammer made Modern Warfare 3 and Advanced Warfare I highly doubt this change will happen though, action movie spectacle is their forte.