Yes. The scaling myth was exactly that, a myth. They are undertuned. If going from ilvl 213 to 238 had you parallel in scaling with other classes, there is no miracle that will happen from 238 to 264. Assassination rogues GOT MORE DPS out of Ulduar than Fury warriors. The #1 spec scaled harder than warriors this tier. Every class scaled to a very close degree in Ulduar. None scaled badly. Fury is decent but not even the best scaler. WIth the massive gulf between warriors and others, they will not catch up.
We have sims now that have been accurate for seeing stat weights and scaling from 213 to 238. We know what will happen going to 264. It is bad. Warriors are just bad. Low damage, low utility, and is actually the one class you could bring 0 of and be better off for it. Worse than feral or rets were PRE buffs for those classes. Both of those got buffed. Ferals to an insane degree, already putting them inches behind assassination, making them the #1 or #2 dps on any fight that isnt Hodir/Vezax stlye mechanics.