I'm interpreting it as intending to allow the caster to avoid attacks, and in this specific case working before the resolution of the attack. If it makes you feel better assume I'm using the named exception in that paragraph for my game. YMMV.
It is a clear cut rule and that's not an exception. The power has a very specific effect that's perfectly valid after a reaction. There's no reason for that interpretation unless you want to just change what the power does.
Which is fine, but that's not an interpretation, that's a rewrite.