I switched last week from a 2008 1.4 ES manual Mk II to the SE cvt Mk III. I wanted a more comfortable ride and an automatic. The ride is a substantial improvement, although your 2011 Mk II may have been better than my earlier one in this respect. I am very happy with the cvt even if you do have to work it if you want a rapid take-off. Better that way then accidentally trying to mount the car in front! There's always the paddles for a quick boost.
There have been comments here about the MK III boot being 2-3 cms shorter, but it is also 2-3 cms taller, enabling to Honda to claim that it is bigger at 354 litres. The Which report praises the large boot, measuring it at 305 litres, which they say is the same as a Golf. Clearly boot measurement is a messy business and depends on how you want to use it.
I miss the handbook storage under the back seat, but I've managed to stuff it in the armrest box by taking out the service booklet. There is much criticism of the handbook section on the infotainment system, but as I don't have a smartphone or an iPod, I've decided to ignore the system - the initial warning sign goes out after a minute or two, leaving the radio on.
Be aware that they no longer supply a jack with the car, which my MK II had. You may like to keep it together with the spacesaver spare if you have one.
Overall, I am delighted with the change, and happy to let all the automatic gizmos do their thing.