One of the major re-writes in the FAQ is that units with the "Counter Attack" ability do not also count furious charge in with it. All counter attack does for the unit is add a +1 to their attack profile. The example for that particular ruling is below the link.
Q. Picture this: My Grey Hunters unit including
Ragnar Blackmane is assaulted and makes a
successful Leadership test to Counter-attack. Do
they then benefit from his Furious Charge ability
(+1 S and +1 I)? Also, can the original assaulter
then deploy defensive grenades to rob the Space
Wolves of their Counter-attack bonus?
A. The Counter-attack special rule only confers
the +1 assault bonus and no other advantages
normally associated with assaulting. Therefore
Ragnar’s unit does not benefit from Furious
Charge. Also, we think it is a bit rich for an
assaulting unit to get the bonus for attacking and
defending, so no, defensive grenades cannot be
used to negate the bonus attack from counterattacking.