I'm restarting the VM right now. Let's see if it changes back... Edit: Nope. It stays with my policy edited
Setting titlebar to black still results in black on black text like Windows 8 :/ Otherwise it seems smooth. Taskbar is a little buggy, when pressing the winkey the non-start menu widget portion of the taskbar appears behind many full screen applications including Firefox.
One problem is that if I upgrade my 8.1 system (Pro WMC), non-english, to English Tech Preview, I'll apparently keep user files but "lose apps and Windows settings", do they mean I lose apps from Windows store, or other programs such as Office, Firefox, as well? (not likely, but maybe I should just wait - I have backups of course)
Unless you stayed disconnected after that screen, that's not necessary. Activation happens automatically later.
Do you happen to have a direct link for the enterprise ISO? en_windows_technical_preview_for_enterprise_x64_dvd_5554079.iso