Looks like leather recipes in general have a lower yield, so I wouldn't be surprised if this is indeed correct.

And who knows, maybe they are making it harder to get deliberately, to keep the Dodore Doublet somewhat of a prestige item even with all the shiny new gear. And I'd assume with all the new crafted gear being introduced, there will be good alternatives for high rank level crafters to wear, so the Dodore Doublet being rarer will not actually inconvenience them.

It appears that you no longer need Woolen Sleeves to make the doublet, though, which is nice!