Yes, in 40-man patch I believe you could not pull aggro as OT, but in wrath Naxx the aggro mechanics on Patch are "normal." I think you're just expanding on what I was saying, and I agree with your assessment.
As far as melee eating hatefuls, I've seen it happen, although I haven't spent a lot of time in 10-man lately so perhaps they adjusted this with 3.0.8 ?

