In FME 2016 the AttributeClassifier has been deprecated in favour of the AttributeValidator. I agree that the AttributeValidator is the future but unless I'm mistaken it doesn't yet carry the full volume of tests previously offered by the AttributeClassifier?
Of course you can get the old AttributeClassifier from an old Workspace, but we shouldn't have to do that really.
None of the other Transformers that the AttributeValidator is designed to supersede have been deprecated yet, so can the decision be reversed, for the time being at least?