I think I shouldn't need an exotic shard when I infuse an exotic weapon or armor piece in another exotic. When I infuse a legendary piece into an exotic I can understand it, because when I dismantle the legendary I do not get an exotic shard out of it. But with dismantling an exotic you either get 1 or even 2 exotic shards out of it. So that's why I think I should not have to use an EXTRA exotic shard when I infuse an exotic into an exotic.