Maybe server lag. "Official" server has some strange effects in wartimes. I failed rare to arcane sail upgrade 9 times in the last FS... It was MM time.
But we got "normal" chances in the 2nd week maybe. Socketing has high(er) chance to fail now. I stopped crafting necklace. I don't risk my "safe" warrior necklace upgrades of the past in this bad luck times... No upgrade = I don't need large jewelry mana wisp...
I can definitely attest to regrade chances being decreased from arcane and heroic. I've always been a crafter/regrader and heroic to unique is just atrocious at the moment.