I've seen posts for Tier 1 and Tier 3 but I definitely did not receive--in my case--Tier 2 rewards when completing the meta achievement yesterday.
I previously completed:
"Return to Grothmar Valley" (all tiers) = 25 red
"Return to Bjora Marches 1" (all tiers) = 25 green
"Return to Bjora Marches 1" (all tiers) = 25 blue
And as of yesterday completed "Return to to Eye of the North" (all tiers) = 100 red, 100 green, 100 blue
So I should have at least 125 each of red, green, and blue from the recent achievements
I haven't spent any shards in a very, very long time
At the moment, I only have 66 green shards... which is <<100, so at minimum I didn't get the full "Return to Eye of the North" Tier 2 reward.
I guess I'll try my luck with support... because it's frustrating given how long it would take to farm the 100 shards