I am surprised at this.
I flew on the densified 777 to YYZ from LGW a few weeks ago (avios in Y) and was op-uped to W, my first time seated in W (have been upgraded a few times to CW).
I thought it was fantastic - a significant step up from Y and the DUT definitely made the sale for me - when not going CW (i.e. personal travel, westbound TATL) I'd pay for W over Y now (if the difference isn't too crazy).
The refurbed seats were very comfy, the IFE is excellent (size/quality), the food was good (though I didn't get a menu.... - just "chicken or beef", which was a bit of a downer, having to choose on the meat rather than what the dish was ... and the prosecco was warm and not nice). Overall I was a big fan... though other than seeing the WTP cabin on other aircraft, I haven't sat in it.