Quoting OP "What makes it really frustrating is, you don't know if you've successfully dodged the weight until a second after the AoE goes off. In every single other MMO I've raided in, there's no ambiguity in the AoE. You know when you've been bad."

This is very important feedback from the game to the player. Imagine if the delay they set on position check was on keystroke input also, it has a similar effect on gameplay.