I already made a long post about the lack of Culandas on the main forum, which got a lot of agreement. I see that you have noted that, and done something to alleviate the issue. That is nice, however, it is not quite enough.
Now Culandas will have a guaranteed drop from the Summerset daily quests instead of just a chance, and the requirement of Culandas for blue and green recipes has been lowered from 2 to 1. That means that there will be a slight increase in the number of Culandas available, as long as people are doing the dailies. And requirements for all the nice purple recipes that people want to make and sell, is unchanged. Once the next DLC is here, people will move on and farm that instead of Summerset. Already Sapiarch motif has fallen a lot in value, and it makes it less worthwhile to do the Summerset dailies.
What I suggest in addition to your changes, is to make the Gryphon set from Summerset drop in Sapiarch motif instead of Ancient Elf. All prior DLC have had their zone sets drop in the new motifs. Summerset is an exception, only one of the 3 zone sets drop in the Psijic motif, the other one drops in the Ebonshadow which was used in Clockwork City, and the style mats from that motif are worthless outside doing a few mastercrafter writs, because of the outfit system. The last set drops in the Ancient Elf motif, a worthless motif way back from the base game. This also does not make any sense at all lorewise. Ancient Elf is another word for Ayleid, which is why the motif and the Ayleid furnishing recipes share the same style material. Ayleids never set foot on summerset, they have nothing to do with the zone. It would make much more sense to have the set drop in Sapiarch motif, an organization native to the zone. This would also mean that at least 1/3rd of the zone sets could be decon'ed for a chance at a Culanda material. This would at least bring in a continual flow of the Culanda materials needed for the furnishing recipes.
This brings us to the new jewelrycrafting sketches. When you introduced the very much loathed grains-of-tempers system, I assume it was to make upgrading jewelry equipment more tedious and hard. I do not assume it was to make the new furnishing recipes just as tedious and hard. But since every jewelry furnishing recipe will require 2 tempers (green, blue, purple or gold), you have achieved just that. No one sells these items on guild traders, even the blue and purple furnishings cost materials of 30-40k to make. Even when I have farmed a huge amount of jewelry dust, I can still only make 2 or 3 of these items for myself, and it is unfairly punishing when you decide to use your jewelry tempers for furnishings instead of upgrading jewelry.
I suggest that you cut the temper cost in half, so that each jewelry furnishing will require 1 temper material instead of 2 to make, which is still essentially 10 temper parts, and thus much more than any other craft. That would at least make the jewelrycrafting furnishing recipes a bit more accessible, while still keeping them more than twice or thrice as hard to make as any other craft.
You have shown that you are willing to look into this issue with the proposed changes to Culandas in the PTS notes. I ask that you go a bit further with both the Culandas and the jewelry furnishing recipes, to take off some of the negative grind that is associated with Summerset so far.
Tl;dr: Change Gryphon zone set into Sapiarch motif, and cut temper requirement for all jewelry sketches from 2 full upgrade tempers to 1.