the treewarden was always viable with or without thorn strike . there are now 3 ways to play a treewarden instead of 2 .
pummel used to (multi) hit in a circle , stunning opponents + triggering procs "on attack" . Thorn strike multihits in a cone shape , just in front of the character , does not trigger "on attack" . the viable procs "after kill" and "on striking" are not so many out there + they are not so easy to get .
it's the reason why Pummel was replaced in the first place , as it was overpowered .
so how is Thorn strike better than pummel ?
thorn strike is fine as it is , no need for nerfing , as that would make it crapy again .