"I am conduction my anual review of the rulebook and this rule stuck out to me as one I have never got right. I thought I would share in hopes that it sticks with me. I may post others as I go along. What rules have you recently re-discovered or discovered you had been playing wrong. The more esoteric, the better.
I knew the first part, I did not know the second part. -- jim"
Sorry to unearth the dead, but this initial post was the only Google result I got for "hero modify CC berserk site:gamesquad.com". I knew the rule you cited, but unfortunately had always lumped Heroes into this 'leader' category, even though they only share the SMC attribute 100% of the time; not necessarily that of 'leader'. Due to a recent rules dive, I came to the conclusion that a Hero can modify a berserk unit's CC attack, unless he is a heroic leader. Been misplaying that one for a long time, as rarely as it occurs.