In the end, Dragons of Tarkir actually increased in value to the point where it was above average, as people figured out that a lot of the casual-looking mythics (like the Dragonlord cycle) were actually very strong in constructed
Your opponent plays a big creature, you counter it
In the average Commander game, this'll equate to a lot of Treasure tokens, even with the "once each turn" caveat
Amonkhet block is chock full of cards that prominently feature Nicol Bolas's monuments to his own greatness, including Faith of the Devoted, Approach of the Second Sun, Splendid Agony, Throne of the God-Pharaoh, Overwhelming Splendor, Eternal of Harsh Truths, Angel of the God-Pharaoh, and Survivors' Encampment
Automaton can also benefit decks that arent tribal themed, like strengthening Talrand, Sky Summoners Drake tokens