As far as I know all 777 were "upgraded" to 777-200 - Meaning the new F/C seats.
I have not been on these but as you can read from other threads on this forum many people say the new F is really bad compared to the old one - And does not worth the extra points/money - However, I encourage you to read the related threads for more accurate views.
The service was always great for me in both C and F, I really like the LY service on their premium products.
Out of curiosity - 50k miles? How do you get an LY F from 50k miles? What program is that?