Call it what you will, imagining or gate caused, original broodlord showed a distressing amount of FD resists; our hunters were among the worst dps because of it. We always sat in front of the gate and broodlord on his 3rdish tweak suddenly stopped resisting FD as much as normal, otherwise something else was changed. This is not something I'm imagining. You can chalk it up to the mobs behind the gate, but then I'd think something changed with them seeing as how the amount of times pre-tweak and post tweak my FD blares a giant red resist sign went from 99% to never.
The hunters in our guild reported the same, as well as those across other servers who were on broodlord when he was still bugged and ridiculously hard because of aggro. Not many nowadays will be able to tell you how rough the first fights were since it's hard to find a scant few of hunters who actually got to experience the bugged and pre-fix version of Broodlord.
This isn't like me crying that Onyxia deep breaths more often, but when 7 hunters in my guild are screaming that they can't get an FD to go off and then magically after the fix they can, I'd say that's a bit of circumstantial evidence that I'll at least pay attention to.
Actually, this was due to the mobs behind the gate somehow being a part of the FD check. Once we figured out to never go in front of the gate, FD'ing actually became reliable, phew!
When I was playing Survival, I only had 1 point in Improved FD, and it helped tremendously in these types of situations, with lots of mobs running around. I really miss having a reliable FD!
It's quite possible that's all it was, I don't disagree, but if that's the case then the FD check applying to all mobs behind the gate has been changed since we still stand in front of the gate and I no longer have the FD resist rate I used to. Like I said, *something* about the area has changed, whether the mobs behind the gate or Broodlord, but there is a much noticable difference.
With that said the only time Ive ever been in a different position for BL is with my priest, and on that character it's not near a necessity.