It's going to be a steep learning curve I am sure, but as experience increases so will results in terms of IQ. If it isn't a good experience for many, then Nikon have put one heck of load of money in to it's development which is the best reason succeed. My own opinion is that I think, but hope not, that the experience is likely to be similar to the D7000 with thread after thread by worried buyers. It'll all be resolved after a few months and most will be user problems.
Sometimes though I think we just have to go with a gut feeling. Buy the camera which is what I did with all my other cameras apart from the D7000, unbox it, hold it, but more importantly now than ever read and read the technical and user manual, then start shooting. Just ask, does the result look good. If it does, then the journey's 50% complete.
I wasn't even aware of Nikonians when I bought my D300 or D700 and I was thrilled from day one and am still