I agree with this. Not only do I repeatedly get exotics I already have, but my Warlock has only ever once gotten a piece of Crota gear that didn't have strength on it. My Crota build has well over 400 strength. I break down Crota armor constantly solely because there's no variation. My Titan (alt) on the other hand has been blessed by Crota's RNG with only intellect and discipline, not once strength.