leaders assisting recovery and related unit activations

[plloyd1010]

"Superfluous" meaning that the fact a disrupted leader can impact ONLY his own hex, regardless
of the fact he may rally successfully....regardless, he does not get to assist in rallying adjacent hexes...

Correct. A disrupted leader can only activate the units and subordinates in his own hex when he activates, thus may not have activated units or subordinates in adjacent hexes to rally, thus may not apply his modifier to their rally attempts. Similar to a demoralized leader may not activate anyone, including units and subordinates in his hex, thus since he did not activate them, his morale modifier may not be applied to them. That last part is indirectly specified in the rules.