As things stand, Demon Hunter is pretty much a dead class. Everything it does is just too slow and doesn’t come close to the value of other decks. Interstellar Starslicer provides potentially infinitely more mana reduction than Umpire’s Glove while costing 1 less.
With the insane amount of armor gain that every class now has access to, it is nearly impossible to rush people down. The easiest way I see Demon Hunter even remotely making a comeback is allowing it to have one of its best tools. In the current meta a 3/2 weapon on turn 4 that does not immediately do something is ceding so much tempo it is asking for a loss.