I just feel that it lacks relative to other break on damage cc spells.
Spells like polymorph/blind can be glyphed to remove all damage over time effects when cast or hex that doesn't break instantly on damage.
I really like this spell for pvp and it's great for cc chaining, however, due to the massive amounts of DoTs in the game, especially in RBGs/BGs, I feel like its usefulness diminishes at a rapid rate when more players are present.
A couple of ideas I came up with are:
Removes all DoTs when cast (similar to glyph of polymorph)
Make it function similarly to the paladin talent "Hand of Purity" where while Repentance is applied to a target it reduces all damage over time spells by 100%
Feel free to contribute if you like.
Thanks for reading!