"Everything I have seen on this forum up till now points to the *ONE4 fares being the best value per SC. Why do you think that the 29K H class is better value, and why has this not come up in the forums, or have I missed it?"
To start with, the 29K fare is cheaper than a OWE. Also, since it is booked in H class it earns full mileage on both BA and QF, no 25% earning for using BA. For those looking for status ; collecting to a BA account registered in continental europe, you will can easily get the tier credits for BA silver (OW Sapphire)from the one trip since BA classes H as full status earning worldwide.
Dave