Microsoft has released an updated task sequence for the Windows 10 in-place upgrade within ConfigMgr 2012. Note that ConfigMgr 2012 R2 SP1 is the minimum version we support for Windows 10 in-place upgrade using this TS.
If you followed the live blog here then it is worth grabbing this new TS to test out the new features.
To download the TS click here
Full details of the new features are blogged here by Aaron Czechowski.