The fact they said that either shows ignorance or arrogance. The curtains are a symptom of the problem, but the underlying issue is seat positioning. And galley size/design, which the crew all complain about. CX management might wish the crew would just shut up about it and the crew are at fault. But they need to hold a mirror up and ask why they keep screwing up with the hard product rollouts, and what is structurally wrong with the company where they keep having deep rooted issues. It starts at the top.

The A350 is lovely plane and CX has really mucked it up in J class. That takes "skill". One time you don't realize it but over flight after flight you realize the CX product is genuinely worse than the competition and it's mostly all self-inflicted. I can say without fail of the 3 A350s I've flown (Qatar, Singapore, CX), CX has the worst premium layout. And those two seats are "worst of the worst". CX should really be embarrassed by them! Qatar has two bad seats up front but they're not nearly in the same league as CX 11D/G. And Qatar did a far better job with the rest of the layout with a nearly identical reverse herringbone design.

The correct response from CX management is "We really screwed up, and in order to protect the integrity of our brand, we aren't seating any revenue passengers there." I'm surprised they're trying to BS you.

You should also talk to Airbus while you're there. I was told CX actually insisted on a fairly customized J class design, which is hilarious because it's the worst of the competition. Zodiac was a mess but two people independently have told me it didn't have to be this bad with CX, and part of their woes are indeed self-inflicted.