I just tried a CM12 SP1 TS to deploy Server 2012 (using MDT 2012 U1). I got the same error as listed here:
Failed to load class properties and qualifiers for class BDD_UsePackage in task sequence
The same fix listed in the KB worked (wording is a tad different).
Unrelated, but also worth noting, last night while making my image, I tried to use the offline servicing to inject software updates into my Server 2012 image by clicking on Schedule Updates in the console. No updates show at all.
The provider log shows that CM is looking for Windows 8 Server instead of Windows Server 2012:
ExecQueryAsync: COMPLETE select * from SMS_UpdateCategoryInstance where LocalizedCategoryInstanceName like ‘%Windows 8 Server%’
Evidently, the fix should come in CU1 (no promises). Until then, just keep using the install updates step in a TS, I guess.