Something must be done about this. 36 leader abilities and only 4 are used: Mystic Echo for SC, Pincer Maneuver for NR, Wild Card for SY and Enslave for NG.
Oh and look, all of these are tutor leaders except Enslave, which still kinda acts the same, being able to steal an engine and play another on the same turn.
And if we analyze further, these are the 4 factions on top, with MO and SK having a more mixed leader use instead of one dominating and they are at the bottom.