It was such a disaster of mixed UI concepts I bet the Quality group at Microsoft just gave up trying to point out the problems. The Vista Designers are actually happy now because they are no longer the worst windows release.
Windows 10 still has problems that windows 8 has. Like Settings and Windows update. It shows up in the menu under settings. Also you still have control panel and windows update. Both do the same thing but different GUI's. They cannot decide between the Metro windows and desktop windows. Also, like Bitflipper mentioned, the new UI for things like network setup etc. are dumbed down with much less information than previous windows 7 versions had. So its back to hunting in the registry for detailed settings. I am skeptical like others that this release won't be ready. The Quality group is stocking up on some good weed to smoke in the June timeframe.