I doubt Gruul decks are going to MD Rhythm of the Wild
They should main at least 2 copies. Not only will that give them an edge versus Control but their nontoken creatures will have riot. That being said, we'll just have to see how the archetype develops over the next few weeks.
Control players would be wise to consider the inexpensive enchantment hate, in my opinion.
Turn 1 Ghitu Lavarunner followed by turn 2 Shock + this or Wizard's Lightning + this is a minimum of 5 damage to the face with a 2/2 on the ground. This is going to see a *lot* of play in Standard in spite of the sorcery speed.
District Guide and Circuitous Route allow us to tutor gates, either to the hand or directly to the battlefield. I suppose the "ideal" number of gates needed to maximize the effectiveness of Gates Ablaze would be 5, but more can't hurt. It should also be possible to take the typical "tutor basic lands" approach then Scapeshift them for gates.
I suppose Izzet Drakes wouldn't mind the artifact--even one copy would put the drakes out of reach of Lava Coil.