Mrs E2S and I fly a couple of times a year to CPT, normally ex-AMS on QR, and with a transfer less than 2-hours we find the break in Doha fine. We use the dine on demand, and eat 2-hours out of Doha. Once on board the CPT leg, we have a champagne nightcap, and skip the food, and wake a couple of hours out, and have brunch. Normal QR tends before BA, Emirates, Turkish airlines around 11:00, so passport control is usually fine. I enjoy the space on the QR 77W even the old seats, yet to try the QSuite. I think the configuration of the QR 787 is excellent if you avoid row 5 and 6 which tend to be noisy.
That said, we are on the Dream Ticket 241 First in January, and chose the BA43 over the BA59, so that we can enjoy the service, and do a fair comparison. The BA59 has a habit of leaving late, and I personally don't want to eat at 23:00 or later. Hopefully I will have a better crew than my last F experience to CPT, when I was reminded that I was OpUpped