Problem as i understand it, and someone please correct me if i,m wrong, is that if you nose over to much when the engine quits the machine may tuck its nose over to a unrecoverable attitude.
With the engine stopping and the down collective the disc will flap forward dropping the nose, if a big fwd cyclic input was done at the same time it may put the A/C in a nose down unrecoverable attitude.
Fwd cyclic also reduces RRPM, but can see the advantage of some fwd speed if Terrain permits as it would help with depth perception on the pitch pull.But i think that would be all.
I remember reading a article on low level engine failures in a Heli ops mag i think, the article was called Cyclic Back and that was the general angle of the article. Cyclic back in a low level power loss situation, it was written after several bad accidents with police 500s in the states, might try and find that mag i think i still have it somewhere