FYI there are still 3 77W with the old 14F, I was on one 10 days ago. What really caught me out is that they're the only BA F cabins left where the loos are behind you: I tried to imagine I was in a 747 again, but it wasn't happening for me.
The other 77Ws with 8F enjoy a single mega lav at the front, the size such a facility should be.
WCs on A380 F are a bit of an afterthought, they look like Portaloos.