Here's what I like about this, after using it for a very short time...
My necro can run up and hit autoattack on a mob, but cast to his heart's delight and I know I'm not going to steal agro (at least not with the weapon), I'm not losing any DPS since he wouldn't be in melee range without this, and he's currently level 49. Each mob I fought with it lasted about 60-90 seconds and I finished most combat with 2 chunks of meat. By the time my necro hits 59, I should have a few stacks ready to be turned to bone, without having to see a vendor.
It's not a huge deal, but it's nice. And it looks good.