I can see one way that RPG elements could work in a shooter. Instead of starting off with shitty weapons, you start off with pretty good weapons. And all of the upgrades you add to it do a variety of different things at the detriment of other things. For instance, you put a silencer on your pistol. This reduces the sound and flashbang of the pistol, but it also reduces the damage and stopping-power that your pistol has. Alternatively, let's say you start putting incendiary rounds in your ak-47. Does more damage and sets your enemies on fire, but the weapon is less accurate. That sort of thing.
As for the internet ban... Actually, I think the US is already trying something similar.