The big advantage is that Adobe can spend time to clean up bugs, interface issues, and general smaller things that will tend to get ignored in pursuit of the the Next Big Release. The subscription model will ensure a more solid product.
I’m running CS6 Production Premium myself, but I’m strongly considering moving over to CC soon.
I can see doing CC especially the full suite if you already have CS6, but the potential for abuse by Adobe gives me the chills if you do not have a “base” to fall back on.