Outside of just running this because its fun, I can see it being useful in decks like Pako, Arcane Retriever and Haldan, Avid Arcanist
Each Spirit token can enter attacking a different player, planeswalker, or battle, and they don't need to be the same player, planeswalker, or battle that the equipped creature is attacking
Beast Relentless could also have a place in the damage theme
However, this change did not carry over to Core Booster sets until the Japanese release of Secrets of Eternity in November 2014
With both the Affinity and Caw Blade bannings, Wizards ' primary motivator was falling attendance, and if Standard attendance is currently dropping, it's not impossible that Wizards would ban something in an attempt to improve attendance and get more players back to their local gaming stores