The "Dead Space 2" debacle made me realize I haven't played a decent single-player shooter in a very long time. The one exception was the rebooted "Doom", which was excellent (and then followed by a much less compelling sequel).
DS2 also gave me an idea as to why. Compared to, say, Half-Life 2, it's such a massive step back in terms of what the level design in particular is trying to do.
I wonder if there's room for a genre revival, but then perhaps "retro shooters" are already that.