Drain is more average, you get less services and Edge gains you less so you can't easily cancel out bad Drain rolls. No Binding but instead summoning multiple spirits means you can't go crazy in downtime for a massive army either.
I suspect 3xF4+1xF6 will become a default tactic.
So that´s 4 additional Combatants, without
any material costs, that can practically teleport around the battlefield and (at least) one of which brings about the same power to the table as an average Streetsam. How is that even
remotely considered balanced? Not to mention the hassle of managing the additional Initiative Scores, Condition monitors and Edge Pools.
And not to mention that Spirits still have their Immunity against normal weapons, while Metas, Critters and Drones only have magical origami Armor.
What Spiritrun needed was a significant reduction in power (and also, a higher incentive for good roleplaying). Instead, it gets a pat on the back.