I will say something for Gervais: he's always doing something. Whether it's sitcom, stand-up, guitar tutorials as Brent, gigs as Brent, stuff with Karl, writing and directing his own films, starring in other people's films, or cameos in other TV shows - you certainly can't call him lazy (in terms of being active - writing style is another thing). Unlike some comedians.
What I think he needs to do, though, is perhaps disappear for a year or two, and properly hone a new idea that changes comedy in the same way The Office did all those years ago. I've no doubt that he could.