Yes - his Bond is more complex and a ring of villains is soon to appear and make his life a lot more difficult.
I think signing John Logan to write multiple films means, while we won't get direct sequels, I think there will be a loose story connecting each film. We might get a Quantum-esque enemy even if Quantum is dead.
After seeing John Harrison (for those of us that have gotten to see Star Trek Into Darkness), where would Benedict Cumberbatch fit into the Bond universe:
He would make an excellent 007, emotional and violent and a worthy successor to Daniel Craig
OR
A cerebral, physical and scary villain that could rival the Red Grants and Raoul Silvas as the best that the 007 franchise has to offer
?