ak-73 said:
The big one, I feel, is Synchronised Assault - 3 Cohesion at the start of an encounter to allow members of the squad to swap their Initiative before fighting begins, essentially allowing the group to set their own marching order. From Rank 4 onwards, it allows you to rearrange the squad's Initiative round-by-round. Being able to choose when you act is extremely useful.
As it stands, I've never seen my own players clamour to make use of Lead By Example - it just hasn't drawn their attention like other Squad Mode abilities have.