The good news is that the ETB is useful pretty much all game long
As far as Amonkhet block cards, GR Pummeler plays some Deserts and a couple of Rhonas the Indomitable, while Temur Energy has Glorybringer and Nicol Bolas, God-Pharaoh
This isnt because the card is useless, mind you
Meanwhile, Helpful Hunter doesn't look like much, but if you look at the greatest tribal decks of all time, they pretty much all have a two-drop that cantrips when it enters the battlefield, like Silvergill Adept in Merfolk or Elvish Visionary in Elves
Cursed Scroll is a means of doing continuous damage to players and/or killing creatures at no card cost
A nice addition to our card draw suite with Garruks Packleader and Garruks Uprising, Tribute to the World Tree making those small creatures larger wont trigger the power-related stuff because the window on them has already closed by the time they enter the battlefield