Things now appear better organised than when the bus first replaced the train. Came in on MH122 t'other day, was among first passengers off (seated in row 9, and door 2 opened for us) and by the time we got through the terminal and to the doors of the 'bus gate' there were two busses waiting and a third pulling up. Stepped onto bus #1, only took a few minutes to load up and off we went.
There's now also a 'VIP' bus service for departing first class and business class passengers – not top-tier frequent flyers, alas – across many airlines which may even speed things a tad more. Will try that tonight ahead of MH123.