Some further notes on the Pinnacle seats and layout.
I was on G-EUYO in 5A (CE) outbound to HEL on BA794 this week. Plenty of leg room, cushion not quite as soft, seat felt more rigid with less back support. The cushion really does feel much thinner. Window spacing was a bit odd as I was halfway between one and another. It's nice to be on a newer bus, as some of the early ones really are getting work-horse syndrome. The fact that it wasn't a convertible seat made it feel less. Coming home on BA799 I was surprised to find it was the same aircraft with me again in 5A.