Yes, I'm in favour of reforging armour! Make it cost 2 Motes of Light because of the odds of acquiring the perks you want are much higher than with reforging weapons.
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Agreed, it wouldn't affect the economy of the game so much either, because you could then dismantle all those acquired legendaries with mismatched perks, pre-update, and get the Ascendant Shards to trade into the speaker for motes.