I did notice that Zentyal 3.2 did boot faster in relation to this. Because of unmanaged_acls option in 3.0 it would take 10+ minutes for Zentyal to boot, because it was reapplying permissions on many thousands of files on the network share. But my permissions were not defined separately on sub directories, they all inherited parent permissions, so I guess it is a plus for me, but agreed, there should have been something mentioning this....