Not surprised. DL also does this with WS operated flights. I don't know if this is intentional or not, but they have been selling " first class " on WS and delivering ony premium economy, which I have flown one and was basically ann all-economy cabin with the middle seat block on one leg, 2-2 seating on another. The other irony is if you look up premium economy on either DL or AK/KLM you will not be offered premium on WS.

I guess it won't change until people report this bait and switch either the TCA, DOT or other regulators.