I've been leary about first year models since my factory ordered, fully loaded, 2010 GMC Terrain back in September 2009. It was my first brand new vehicle and was built then parked for over a month before being released. I had many issues with it - some major and others minor - and it cost me big to dump it after just a year.
To be honest, of all the vehicles I've owned over the years I would say my Edge was the best in terms of quality, squeaks, rattles and such. My MKX after 18 months and 12,000 km has an internal symphony of rattles - and the speaker grilles vibrate with any kind of bass when the radio is on. It's kind of a shame when the $20,000 rental Hyundai I had was so solid considering it was worth a third of what my Lincoln was. Maybe that's the downside to an older platform.
I have high hopes for the next MKX but I will only buy one if it has been out for a year or so.