Have seen some recentish posts that indicate that this is still possible... you can only try, and let us know how it went.
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In the past when i phoned the WP number, I don't seem to be getting the premium desk.
Does it even still exist?
Right. And they won't automatically make a seat available as an award just because there is an unsold seat available on the flight. They make a judgement about the likelihood of actually selling the seat vs keeping a high-status FF member happy.This is releasing seats that are still notionally available, right? They won't actually boot a low status person off the flight to fit in a WP or two?
WP may only request a J seat be released (but definitely no Y).