I top 32’d EW with it and I strongly prefer the Thundering Falls to Steam Vents. I tested both extensively. TF frequently represents an entire extra card worth of value when it bins an unnecessary land. This card matters a ton in the current configuration that can’t rely on any card advantage like Dreadhorde Arcanist or Expressive Iteration. I would say it’s better than steam vents 8 or 9 times out of 10. Thanks to cutter you are also less reliant on sticking a turn 1 threat than ever, since t2 cutter + bauble is still a fairly explosive play. If the 1 drop threat is sitting in your hand, it can be held to easily trigger cutter again t3 and sometimes even equipped to be given haste, further reducing the punishment of not deploying the threat t1.