I'd like having moveable sets as well. The devs wanting you to farm more mods makes sense from a competitive standpoint,though. I don't care so much about moving my arena mods around to make an otherwise poorly developed team useable, but so I can mod for the situation. Like switching mods on R2 whether I'm using him with Rebels or Res. R2 is the best example I can think of, but there are other situations modding a character for a specific purpose would be helpful. Maybe lock arena mods for a certain time? Or a cooldown period after moving? Idk.