Experiences vary widely
This would be in direct contrast to my own Win8 personal deployment. It's a member of a domain, which doesn't have a large amount of group policy. SCCM client is fine. Office works fine. Metro apps launch just fine (your experience with Metro apps not launching has been noted by others on the MS forums). So it'll be a group policy breaking Metro apps, somehow.
I'm using it as the day-to-day host for a stack of VMs (including my corporate SOE VM) and running apps, connecting to other networks etc. I've not yet had any crashes or BSoDs, though VPN setup was annoying, requiring a logoff and logon to connect.
The inbuilt mail/calendar clients are ActiveSync clients, so the PC is treated the same as a mobile device (enforce PIN/password, screen lock etc). If you have working ActiveSync and AutoDiscover then the setup should find things; any problems will likely be that the internal and external addresses for servers will differ (so they may work only in the environment in which they were set up originally, be that internal to the network or outside the network).
Biggest annoyance is Metro apps not working behind an authenticating proxy. This is probably the killer bug for any corporate deployments - they HAVE to work, and work well. Right now they don't work at all.
If you've used the Win7 Start > search functionality, or you use a scroll mouse, the Start panel should "just work" - you hit the Windows key, start typing what you want, and press enter (maybe an arrow or two). Or you hit the Win key and use the mouse to scroll (though I still wish the Start panel would treat mouse-down the same as touch, and mouse-up as release on the background so you could drag it).
Overall mark: 8 out of 10.
Biggest takeaway: Stop moaning about the start panel because it isn't going to change. It's going to be there on Windows Server too. Try USING it for a full week - don't stop after an hour because you don't like it. And if you don't believe me, cast your mind back to 1995, and I pretty much quote the newsgroups: "OMG the Start button is horrible! I want Program Manager back. Why should I put my mouse all the way down to the corner to start a program? What's wrong with the way it was?"
@ShelLuser: He IS the network/server admin. He is the one who SHOULD be trying it out, though perhaps not the daily driver, even if that's also my preference.