So, what this plugin does is override the gather followers call, so when followers are off, they are instantly teleported to the player without an animation. However, if followers are on, the gather animation will still play.
A good use for this would be an event in which the followers would need to gather to the player, and the player moves, then when the followers are turned back on, if gather followers was used before they were turned back on they would instantly be at the player's location when followers are re-enabled, rather then seeing them gather as the followers are re-enabled. This would also eliminate the need to use wait times as the followers gather invisibly, providing a better game play experience.