I personally was afraid of the change, but I took the plunge and never looked back.
For me CC was a must, since I bought a new laptop with a 4K screen and all the applications were tiny and unreadable unless I decreased the screen resolution,and starting from CC 2014 Adobe added support for HiDpi screens.
But honestly, I love the subscription model. I am always immediately up to date with all new features.
I really don’t see why you shouldn’t update. Everything’s that’s in CS6 is in CC as well. Plus plenty of new features and enhancements. Besides, let’s be honest, it’s a only a matter of time when you’ll start to realize that CS6 is very outdated. It’s not so outdated yet, but it will be pretty soon. And the longer you wait, the more overwhelming the change will be. So you might as well jump into it right now, and slowly discover and learn all the new features that come out slowly but surely on a steady basis.