My experience:
I missed a connection NBO - DOH - PSA and I had been diverted to FCO.
My overall delay had been 12 hours
I had 6 hours waiting in DOH airport and they gave me ORYX Lounge access after my insistent pressing.
Once at home, I sent an email complaining and at the beginning they gave nothing; with a second upset email I got 3.000 QMiles + reimburse of my expenses upon receipt.
At that time I was only Burgundy