I did the LR CC update this week on my two Win 8.1 PC's. Completely smooth, no hitches update from LR 5.7. The new features are welcome, the speed boost is immediately tangible as is the responsiveness of the sliders in Develop module. I'm happy with the full CC suite model, updates come in pretty often and the CC Suite is massive in it's scope. If you shoot both still and video and use PremierePro, the CC Suite is brilliant. For stills-only shooters, the CC LR/PS bundle is really great value.
Face it, the subscription model is here to stay and we're already seeing software companies from Adobe to Microsoft, accounting and so on quickly ramping up their subscription-based futures. So rather than grumble about vanishing perpetual licence models, we should just knuckle down and do what we do best...shooting great images.
-pw