Just making sure we compare apples-to-apples: you are all aware that during Ramadan no booze is available on the ground (DOH lounges and per-departure drinks ex Muslim airports - including KUL - might be important for thiose flying to HKT). Fancy a drink on the ground? Fly with TK or EY or book QR outside of the Ramadan period. This year Ramadan is 28 Jun to 27 Jul (I am not a Muslim myself so just googled it out).
PS. I do not want to offend anyone - FYI only so folks would not be disappointed...
I think HKT is routed either DOH - HKT direct or DOH - BKK - HKT. Not via KUL.
Also you can still presumably get pre-sloshed on the flight OSL - DOH and then subsequently DOH - SIN? So I would say avoid a long stopover in DOH during this time, but otherwise really not a big deal.