I don't think everyone would use it, especially when the meta is in such a good places. Because Thorn can't over centralize the meta, along with other HCs, anymore. Most expert HC users would do well of course, but we'd have outright trouble handling Auto Rifles or Pulse Rifles. I'm basing this on level advantage and Trials. People would probably feel the need to use Thorn, without realizing they don't need it to win.