Not sure what happened, but trying to find Grave Moss against the cometary ground is virtually impossible. If you have DarqUI "night vision," they pop right out easily. Someone might want to take a look at this.
They are tiny and not terribly sparkly at all. Could they be somethinged to help them be a bit more visible?
Not only that but there seem to be very few spawn locations and long times between spawns. I saw 5 players on Skyfire early after the servers came up all trying to camp those spots. Luckily you can wait till the 'rush' is over and then do it, but compared to the leaves and bark parts of the quest it was silly. They are a bit easier to see if in 1st person mode though. I question the spawn time.
More sparkly and/or much better contrast between the moss and the ground it's on. I've seen great camouflaging in my day, but nothing like this.
Turn off Flora in your display options. They also show up with Ultravision, Sonicvision, Infravision, etc I agree they should be more visible though