I fly these slimline seats on EasyJet and Air France Domestic and they are acceptable for hops of about 1.5hrs. Going to Athens or Cyprus in these will not be fun.
Air France do not use these slimline Recaro on international short haul routes (they have the Pinnacle seats as BA do today with moveable divider). This seems a more sensible strategy but then again AF/KLM don’t make the kind of profit that BA does.
I think BA has gone too far with densification if it results in a three class cabin on Short Haul which is what they have now ended up with.
WiFi (chargeable) and Power sockets don’t compensate for the discomfort on a 4hr flight.