Agreed flying premium economy is not uncumfy. Why pay 3x the amount on a ticket to lay down in first class when you're going to do it in a bed within a half days time anyway. Airbus has definitely developed passenger comfort.
Although only the Non Imm O-A Visa is mentioned, this will also certainly apply to the Non Imm O-X Visa, both of which are long term type Visas. It will not apply to Non Imm O applications.
The change has been approved by the Thai cabinet, but until published in the Royal Gazette is not official.