Think you are misguided as to the rosters on the A330/A350, have a look at the CMP pairings just published to see the luxury they are in for.
Luxury??
I thought the same when I looked at the pairings for us crew in HK on the 330/A50.
I can see there's going to be plenty of pineapples going around, but it still looks as if there's patterns to all the destinations, albeit with plenty of night flying fillers. So overall I wasn't impressed, until an Australian based colleague of same vintage showed me the Aus patterns. Almost all are WOCL flights with a large amount of camels n curry thrown in. On reflection their Australian based patterns have only one decent pattern out of the 70 or 80 I saw, and not even an occasional ULH to Europe, so CMP has well shafted them. In comparison, our options in HK look good.