Bought this in the Steam sale and so far I'm absolutely hating it (the single-player, haven't tested the MP and don't intend to). Aside from the annoyance of having to sign into RSC, there's the slightly janky controls. Cutscene interruptions at a ridiculous rate. Cutscenes that often place you in a less than advantageous position when they end. Cutscenes that change your armament. And the glorious steam integration where pulling up the overlay to chat with your friends simultaneously drains your bullet time (shift) and uses up your painkillers (tab), instead of auto-pausing. The cover system feels weird too.
I'm just not having any fun playing this (up to chapter 5), and so I haven't even launched in more than a week. Think it's going to join LA Noire on the grand small shelf of games I never bothered finishing.
It should be mentioned I never liked the first one either, and so skipped the 2nd installment of the series. Just not my type of shooter.