I've not had any _real_ showstoppers so far. Occasionally the Host Setting for Process Synchronisation will got mental requiring me to shut it down from task manager. Windows Mail can become a little unresponsive - showing unread mail in the icon, but needing a shove to actually get it to come through to the client. And Microsoft Solitaire Collection simply won't work (stop the world, I want to get off).
Other than that, I'm happily using 10 as my everyday OS.
(Of course, I could have just hugely tempted fate by saying all that)
I had the same issues you list here (with a couple of other processes that would rev up the fan), plus:
1. Internet Explorer became very unstable. It would crash 10% of the time (which is significant given how often I use it), and on a number of key sites for me.
2. The connection to Disqus broke (on all of my machines, oddly enough) and so I could no longer post comments to any Disqus sites from IE. I had to use Chrome, which I do _not_ want to do.
3. I was having an increasing number of locks-ups that could not be fixed by unplugging/plugging power. I was resorting to Power-Down Volume hard shutdown multiple times a day, and losing work because of it.
4. A few MUI apps stopped working reliably, particularly Tweetium, which needed constant restarts.
5. In general, I was having issues with apps not opening/maximizing from the taskbar and needing restarts.
6. Live Tiles just didn't work reliably, or at all. And I like Live Tiles.
Then there are the other widespread issues like drastically reduced battery life. Overall, there's a ton of promise in Windows 10, but when I went back to Windows 8.1 I've found things so refreshing stable and quick that it really demonstrates how much work there remains. Hence my hope that the next build is far more reliable.