Could Thorns be changed to something useful?

The druid spell thorns, is really a waste of space in our spell book… oh yay a huge 12 nature damage per hit… so it might do 36-48 damage to someone total… How about remove it and give a defensive cooldown… or really buff its damage so its worth casting…
I mean there is even 3 wasted talent slots devoted to this to increase its damage by 75% but 75% of nothing is still nothing.

Its meant for PVE Tanks to hold agro. Get the improved version and put it on your pali tank that aoe pulls and see how much Thorns damages its like 5-10% of a Tanks dps + it helps them hold agro.