As more people get used to the camera, you will see more posts with useful information and a lot less complaints. That is the cycle that every camera in recent years has gone though as features keep multiplying. It takes a while for new habits to develop so, initially, those people with the most frustration are still applying old habits that were learned with a previous camera to a new camera. Whatever they had before, was not as capable or demanding so it is not unexpected that old habits would result in unexpected results.
Funny, look back 5 years and the D3 as reliable and capable as its reputation is now, was being complained about for being a dust magnetic. People howled for months about the terrible D7000 focus accuracy but now it is considered the finest Dx camera made. The camera did not change on the shelf, people learned it. Same with the D90, which has the reputation of being the most fully sorted out camera in the Digital era, with not even one bug fix firmware release. Just go shoot and have fun with your great D600, a D3x beater at 1/4th the price, and ignore the complaints unless you have some specific advice that could help someone get over the hump. Stan St Petersburg Russia