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I believe special weapons doc is the last surviving mess of relics UKF launch design decisions. Hold the line is the biggest example of that trying to combine three abilities in one with a high 250muni? price point. It's just the ability is so bugged and situational it never warranted a nerf unlike air superiority.
But the balance team have some creative freedom with changing the doctrine. They could even make a unique Bren/Vickers profile from the HT that is more like the BAR and a assault weapon.