Further thoughts / feedback...
Phone number doesn't appear to be collected... IMEI, Manufacturer and Model are, but no Phone number... it would be useful to have that.
Associated user also seems to randomly be filled in; sometimes it is, and other times not, for the same device.
Biggest one for me however is the lack of password policies... they seem very spartan (no number of last passwords remembered, no encrypt options), and what is available (in my option) is useless because users aren't prompted to create a PIN... so a corporate device is left with no PIN if a user doesn't manually create one (and you can bet they don't unless forced), and because there's no compliance checks it doesn't matter if the policies that are in place fail or not....
Considering this Preview is focussed on business owned mobiles, strong password policies that users are forced to adhere to would seem a key thing to tackle early on...