In regards to Heavenly shards, I am already seeing a large shift on my server. The bog standard price has leapt from 25g average up to nearly 60g average. I had put this down to post patch enchanting bonanza that is the new Z's , but as has been pointed out, without the stead influx of normal shards from none Z's heroics. The supply has very quickly dried up, and I can see the price sustaining around the 55g+ am benefiting from this drought at the moment. Now depending on your shuffling mats of choice will depend on the ease of you getting the Shards. But I can see that for this reason alone, still shuffling the like of Alacite are still (just mind you for my servers market at this exact point) worth it instead of vendoring.
Hessonite and nightstones net around 8g after disenchanting.
Always keep in mind that you can transmute them into Ember Topaz and Demonseye. On my server a cut Demonseye or Ember Topaz can be sold for 50-90g. This is not only great profit, but the transmute can be done with a single click while the crafting and disenchanting of the greens take significantly more time.
Also it might be worth to hold on to your Alacite and transmute them into Amberjewls if their demand rises with the introductions of the new pvp jewlery.