Windows 8 is introducing lots of new UI paradigms and is definitely a "version 1.0". It required me to think a bit differently about how to approach tasks, but now that I'm used to it, I'm much more productive. It will continue to be tweaked and I'm sure by SP1 we'll have all forgotten the little annoying bits. Windows XP was pretty bad when it first came out, but no one remembers that; they just remember the post-SP2 XP.
I have no problem with trying something new, 1.0 and all but they didn't have to nuke (or make difficult to access) what worked well. It's like I've said all along that they are trying to force the acceptance of these new, unproven approaches on people rather than letting them opt-in and it seems kind of arrogant on their part. Hell they could even make the out-of-box experience use the 1.0 by default but let us change the default to our liking if 1.0 just doesn't cut it. Office 2013 is a great example of that. While the OOB experience is quite different than Office 2010 you can dial back the changes if you want. I'd think Microsoft would want to do that to spur adoption by business (i.e. let them deploy Windows 8 configured in the manner that they want to support it in -- start menu vs. start screen, boot to desktop -- boot to metro, etc.)
In addition the 1.0 (all the new stuff, not just search) returns Windows to that half-baked state we've seen in just about every version of Windows prior to 7. Take the control panel/PC settings for example: some things you do in metro and others you do in the desktop. On a desktop PC that may be fine but on a tablet I don't want to try and interact with a pre-touch UX on the desktop. The reverse is true for things like devices. When I want to get to the details of my device properties half the time I'm whisked away to the devices section of the metro PC Settings screen when what I really need is the old control panel's devices screen because you can't bring up device properties in the PC Settings screen. It's just one big hot mess.
BTW I thought Microsoft said SPs will not longer include feature changes and additions so I'm not so sure W8 SP1 will improve on these areas unless Microsoft considers them a bug or security issue.