Having been back on 8.1 for a day now I can honestly state that in my opinion, W10 in its current state is not ready as a daily driver. It's fun to look at and try the new features but to actually use on a daily basis, well not for me anyway. I am surprised given how long MS has had with this that W10's first "new look" technical release isn't better developed. It feels more like a poorly skinned 8.1 that was sort of thrown together as a proof of concept than a shiny new OS closing in on a Consumer Preview. I actually believe that referring to W10 in it's current state as a beta is generous. For me it is barely scratching on alpha. Things like the pathetically inadequate video driver simply should not exist in a public preview this far along in the development cycle. In some ways, W10 is less intuitive for the neophyte user than 8.1 was.
The best part about W10 is how easy it is to remove it from your computer and return to 8.1. That means as new builds arrive I can give 'em a flash and see what's up, then within 10 minutes be back to work in 8.1.
I expected more but having been a MS customer for decades now, I'm not sure why.
P.S., Honestly MS, what do y0u have against the HD Control Center? If you are going to force us SP3 users to forgo it, how about replacing it with something similar? The fact you delete a wildly popular feature and basically tell us to screw ourselves because you know best is annoying and so you. GIVE THE CONSUMER CHOICES.