I've read that QR has placed some restrictions on lounge access dependent on the various subclasses of QR J. I do have to say that I did like the sliding door on my 2022 flight as Qsuites included a group of six children who were quite curious about the other passengers! And glad you got into the DOH QR business class lounge. Service was fairly minimal on the 2022 flight and I was quite disappointed.
I've flown Qsuites, twice pre-COVID and once after COVID (sort of) (February 2022, DOH-IAD). But, like you, I want to do when I want to do it with no discussion (other than getting some input from locals at times).
Friends and family can't figure that out. Yes, I am a solo traveler especially for long haul trips. I am not going to do post quotes here, but I'll add my own commentary. Your trip reports are the 'book I can't put down'! And good to see you here again! At least you posted this while I was having dinner last night.