I see. The NC template lands a direct hit on an Eldar vessel. But the hole is smaller then the Eldar's base.... wait, that has always been the case:
if a ship has the hole from NC template over the base the ship takes D6 hits.
if a ship does not have hole over base but edge of NC template it takes 1 hit.
Now, the Eldar is attacked by the 'hole' : it will roll a holofield save first: 2+ is saved, blastmarker is placed. If missed the Nova Cannon does D6 attacks.
If it is no 'direct' hole attack the ship takes 1 attack automatically from the NC.
Pretty poor wording in FAQ 2010 as it still leaves room.
Well, if I was attacking Eldar escorts I would place the NC template in the middle of the escort squadron to touch as many bases as possible. Just glancing those bases with my NC template.
Yes, I can see a design flaw in that NC vs Eldar ruling.
(But then again I see a problem with the official Eldar rules.)