I really hate squads without the possibility to add an engineer. medics squad really could need an engineer to build rallypoints, ammo boxes, and all that little stuff.
the japanese premium squad already has it so it shouldn’t be a big deal to add these to the techtree squads aswell.
the medic engineer should get a unique building maybe a small medic tent which automatically heals those who stand nearby, this way you can actually build a small safe place for your team, the tiny box alone is not worth it at all.