As per above..

The route is the most reliable route on the network for the very reasons you state. If on the very remote chance they don’t fly that timing you will be rebooked in a way which is unlikely to affect your agenda unless you are very time-sensitive (+/- 1-2 hours). Of course weather can play havoc on this route occasionally but that’s the same for everyone on this route. It is VERY status-heavy, however it really is largely irrelevant in most disruption circumstances on this route in my opinion given the alternatives available.

Club Suite is basically the same seat on any aircraft on the route, and it would feel so especially on a short TATL overnighter.

Take the last flight of the day (11pm-ish) if you want to get to London for a comfortable check-in time. Just make sure you get on that flight suitably knackered to ensure you sleep the maximum 4-5hrs on the flight.