Not to dampen your enthusiasm, but it doesn't seem likely that the classic mode will ever catch up with Cinnamon: I seriously doubt that they'd pour much effort into it because it might threaten their "vision" (not to speak of the "brand" ;) wrt Gnome Shell.
One could also remark that not such thing as a "classic mode" would have been conceived if it were not for the success of GNOME 2 and 3 forks (Mate, Cinnamon).
At this point in time, I'm pretty happy with Cinnamon as is: it's much more than a "classic mode", although among other things Nemo kept all the useful features that they threw away with Nautilus, and more stuff is coming with Cinnamon 1.8 (http://www.webupd8.org/2012/12/what-to-expect-in-linux-mi...).