Will shard-droppers be added to Dunland and Rohan – they’ve disappeared from the game since Mirkwood
Rowan - Warbands were the shard-dropper solution for Rohan. As they move forward into new areas they will be looking at that mix of more challenging landscape mobs outside the standard quest mob.
I find this a very bizarre answer. Shard droppers have one key feature - they drop a shard (or mithril flake, for t6 zones). Probability is 100%. Warbands almost never drop tarnished crests or emerald shards. From what I've seen, only "raid" sized warbands even have a chance to drop one, and the probability in my experience appears to be under 3%, with a large uncertainty due to small number statistics (IIRC I've gotten two from Bosnauk-farming on three characters since HD). I do not consider that a "shard-dropper solution". And I think that's why the vast majority of tarnished crests were obtained via the skirmish camp, and the same will be true of emerald shards as soon as they get there.