I just flew one of the LGW four-class 777s. I was sort of dreading it based on the reviews, and my normal preferred seats on the 744s - 14ak and 64k being truly terrific. I had 10a which was actually fine. I dont know if it was how the person on the aisle was sleeping but I really had no problem stepping over him while he was sleeping.
The only thing I noticed was no AVOD although everything else was the new version of CW.