Board Thread:Game Discussions/@comment-85.30.182.231-20171207220927/@comment-27862737-20171211220943

Correct; there hasn't been a new Epic Boss (completely new, not recreated/reskinned) since mid-July, 2016 (so nearly 1 1/2 years). They've just been re-using them and added the ++ versions of a bunch (but not all) of the EB-specific Epic armors.