While this may be slightly annoying, the reason for this is the teleportation plugin is trying to properly place you in the world (to avoid the issues where you spawn in lava). As a result of this, you are actually teleporting about five to six times when switching worlds (hence, the reason why there are so many particles when doing so). Without drastic changes to the way the plugin works, this cannot be done at this time. It is not a significant enough issue to warrant a complete reconstruction of the plugin that has otherwise worked well. That being said, this report is denied.
