Back when we had the Elemental Well system, there was a mod called Well of Ions, which increased your melee damage for a short time when you picked up an Arc elemental orb. They should bring that back, and merge it with Amplified. It would give Amplified a more offensive function, and synergize better with the Arc subclasses' close range abilities.
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Each class should have some sort of amplified boost. Hunters get movement and melee speed, Titans get resistance, Warlocks get regeneration.