In order to make squad leaders a bit more important and force communication in-game (will explain in a sec.), squad-leaders should have the possibility to draw in the map and share this info with squad-members (or even other squad leaders).
I.e. a green, blue and red pen, with which the squad leader can draw on his map and with this, mark either enemy sniper nests or movements and also consider directions and paths, the squad should follow
This would then i.e. also encourage communication towards the squad leader by the team (i.e. enemies incoming from xyz, or Sniper nest at bell tower, etc)
For this communication, it might also help to enable a finer grid on the map, to easier identify and communicate positions ( i.e. enemies coming from A4 towards B3)