I don't get people like you. This is an insider preview, not a public preview, and even if it was a public preview - which it is not - it remains a PREVIEW. By participating in this preview program you have went into a agreement with Microsoft that they are allowed to use your device to test their buggy software, for which you get to be the first to use the new software. Now you complain about the agreement to which you signed your name??
Yea, no crap. I have been installing build by build (from the very first build)and have watched progress step by step. We were going from a fairly buggy build that was being worked on for over a month, clamed feature locked and they said they have been working on minor and large issues, not adding new features. With the time they had it, and the build numbers, I bet most people would of expected it to be more refined than 10166 FAR MORE REFINED, with more bug fixes and little issues fixed. They clamed 2000 fixes, ok, great, yea, a bunch of them are subsystem fixes that we would never see.
As a refined system and feature locked, I would expect it a lot more refined and a lot of the bigger features to be addressed or at least working for the most part, like Cortana ? At this point ?
The thing is, I don't get people like you, who set something at a stage in software and want to see more progress than it has been. It's not like Microsoft is a garage of programmer working on a shoestring budget. There are THOUSANDS of programmers working on this.
Even if the basics like notifications, live tiles, etc were addressed but still very buggy at this point.
I will give it a few days but, I need to see how bad issues are here and there. One app that was working, just stopped working completely, would not even load, never saw that before in beta/preview software or retail....interesting..