Is anyone using this skill? And, if you are, in what scenario do you let it fly? I just can't comprehend its benefit. I don't want to throw away all my wrath (which will immediately lower my critical rating) and force me into man form to rebuild wrath. Granted, I do that in a routine to set debuffs and buffs and bleeds. But, I can do just as much damage using Armor Crush, Tier 3 Thrash, and Vicious Claws. Also, there is no guarantee that Execute is even going to do a good bit of damage.
Case in point: Cassava scored a partially evaded hit with Execute on Girwael for 37,188 (36,258 from 65 Wrath) Beleriand damage to Morale.
Really? Blowing 65 wrath and a good bit of critical rating on a 37k hit. Why take the gamble? If there were a buff or debuff attached to the skill, it might be worth the risk since those would be placed no matter what. But, as a stand alone skill it's hit or miss. And, with the mediocre state of dps on Bears, it's a gamble I don't understand.