It won't happen for pvp reasons unfortunately. Even at high end pvp, simply swapping your armor the moment the introduction is over immediately removes the advantage of knowing the enemy's armor if the exotic armor is sharing a legendary ornament with one of their other pieces.
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You say this as if the pvp can be taken seriously it cannot be balanced for the simple case of the variety of possible loadouts and three different character types so who gives a damn about seeing people's loadouts