I seem to be reading in other threads in this forum that there is now debate about whether there is truly a one-roll system, or if it's two-roll for special attacks (or perhaps I'm misunderstanding the debate). Can someone give a quick summary of the status on that?
Believe someone discovered a while back, testing with a Rogue, that specials are on a two-roll system while white hits are on a single-roll. I don't of any detailed tests for ranged or spell.
It's not that recently uncovered--I remember some knowledgeable person (Kenco?) mentioning it on this forum a very long time ago. It's just more talked-about now because of Paladins.
Yes, that's one of the reasons why no one takes Shield Spec for Shaman. Caster Shaman are pretty much the only type who use shields, but it's worthless since anything but auto-attack will prevent you from blocking.