This as well - but I think fundamentallyl Malaysia is very much in developing economy stuck in a middle income trap, political instability, covid ( thankfully over). Things have only recently turn around.British interests tend to be in closer to Johore - I'm thinking the Dyson Factory, and Singapore

I could see this make sense as 787-8 route, with no F. MH has been free to charge a lot without any competition, I actually prefer going via Singapore, the QF flight on the A380 is nice ride and timing. Things could change if both the British and Malaysian economy improve, rather than this being a pet project of a countries sovereign wealth fund, i.e MH operated by Khazanah National.