QR didn't have their opening hours posted outside. Do they show them when the lounge is closed?
I checked, and they have flights from BKK at 8:05 am, 9:05 am, 7:40 pm, 8:25 pm, 8:45 pm, 9:05 pm and 2:10 am, so sadly the AY midnight flight doesn't work even if they have a whopping seven flights a day.
Must be a year since my last visit to the CX lounge. It was okay but apart from the noodle bar, there wasn't much to eat, and I'm not a big fan of the noodles. Like you say, nothing special.
What kind of food did JL serve?