If this turns out to be a genuine case of "roll off," then I wonder why the pilot didn't simply beep the nacelles forward and fly out of it? That is the "so easy a child could do it" response to a roll-off, no?
Because you're confusing two different phenomena. Roll off caused by VRS (to which LtCol Gross refers) and roll off caused by another aircrafts wake...same term different thing. For a roll off caused by VRS forward nacelle is the answer because it sheds the rotor vorticies. I don't believe it to be effective though for roll off caused by wake interaction.