I have been playing since the EA launch and I remember liking the aesthetic of the leader class, especially the unique empty helmets. Since the class was essentially useless, it was later "disabled". My suggestion mainly involves adding at least the default leader empty helmet options to Assault, Engineer, and maybe Support as the only empty helmet option, along with Recon.
There could be extra variations in the cap design, of course , depending on the class (medic), and an additional option without the scarf/bandana would also be great. This suggestion also aims to repurpose these assets for more soldier customization, ensuring they dont go to waste.
Edit: if i recall correctly the cap version was for the rus team, but having it for both would be fantastic. Ofc changing the flag or removing it.