Out-Of-Turn Dodge

[Sekhmet]

Knowing the roll makes it overpowered, because no one would use it in a roll which couldn't hurt them. Its like having +4 AC every time you lose initiative. Then again, this can really turn against the PCs if the DM waits for their attack rolls to decide....

Quoted text suggests that if your COULD know the roll, it would be a greater asset, not that you DO know the roll.
Divination could help in this case.

 

[Hrothgar Rannúlfr]

Absolutely.
Consider the damage Wizards could do with the extra 4 AC and a Wand of Metamagic: Quicken if he was still able to make his move action.

Redirecting spells is also a move action, iirc.

+4 AC is a substantial reason to lose your turn at lower levels, and an even greater asset if you can know the roll before you decide.

Thank you, Sekmet.

That helps a lot.

I didn't even consider the idea of metamagic quicken rods being involved. That would definitely make it overpowered!