Only way I can see to bypass this, if flying long haul, and needing to do something in KUL, eg, LAX to KUL, or vv, and you can forgo a bit, and live in ADL, is to fly the ADL - KUL sector in Y, or the cheapest fare, and then from there to to the UK (on from/to UK flights, if you are an AAadvantage miles member, put that into the MH booking (!), US/other cities in J/F.
So long as it does not involve Aust, the points and SC earn is quite good, ie, LAX - KUL in J is 160 QF SC, one way.
Its on the QF earn calculator, and flying MH J.
Ie, make a separate booking via a TA/online on the MH website.
Even putting an AA code on UK to KUL, flying MH J, will still earn 120 QF SC.