DW1 on blu was kind of a cock-stab, yea. But I look at it like this: Blu had multiple subs that are useful. On all those subs, they can now dual-wield. Free bonus to DoT, TP gain, and offhand stats (maybe). Thief, on the other hand, has 1 sub that is ideal 99% of the time (/nin). The remaining 1% is split between dnc (has dw2 as a sub), and /war/rng/cor/w/e.
So essentially, we're buffed for salvage pre-subjob cell, and that's about it. I think most are frustrated that SE devs have potentially wasted time "updating" us with almost nothing.
Hey, we should have seen this coming though. Think of despoil as the foreplay to DW1.