Agreed anything is better than loner it and coherency talents are like a vestige of coherency regeneration at launch which was the only toughness regeneration method then.
Maybe a lil misunderstanding, engaging ranged with melee is often the best option when timed right as they will as stop peppering you and team to engage in melee even shotgunners and gunners the main threat to downs by withering toughness fire. Dealing with them from afar has added difficulties of sending them into cover and scatting with suppression.. only for them to take up better covered positions.
With multiple threats each team member must be able to hold their own while the threats to team are witled down often not everyone in one clump of a kill zone.