The range is short for Thorn Whip, and its effect doesn't drag them far, so its ability to control the battlefield is limited. I did use it on a couple of occasions to drag a unit into a hostile area effect, but never to do anything too interesting. In this game, the cantrip does serve as a ranged attack for a class that has none of the ranged weapons its proficient in implemented yet though. But, Produce Flame is better for that purpose, hands down. Maybe someone else has had better luck with it.
