During the interview for a position mention was made that they (being the beancounters/upper management I assume) had done their homework and expected substantial oncarriage from their regional routes, sounded a bit iffy at the time purely based on volume of travellers.
Clearly the incumbents offer enough so that REX have not established a presence ML-SY-ML and probably won't....for now.
Only hope would appear to swing into the Tiger leisure market, maybe try and develop new/under served routes and then maybe....maybe have another go at the golden triangle later with better brand recognition.
Unless there's a desire or need to lose XXXX amount of $$ you can't sustain the unsustainable.