Not privy to what the new CX procedures are, I will say this: I reckon the Qantas seat-belt procedures are probably the best anywhere, so any alignment by CX towards QF's procs is a good thing. And don't worry, I am cynical about a lot of QF things, but not this one.
QF only turns the signs on when there is a risk to both passengers AND cabin-crew. If seat belt sign is on, EVERYONE sits and straps in. This foolishness I see around the world whereby the sign is on, pax are strapped yet c/c aren't must stop. I've paxed on CX numerous times (and EK, and other European carriers) and the sign has been on for 40, 50, 60 minutes plus, and nothing in the way of a ripple. Meanwhile c/c do a full service. The sign is being used as a crowd-control device. The message is confusing - pax end up not respecting the sign, c/c cannot be sure you're about to enter a bloody great CB. No wonder pax get up in the middle of a genuine turbulence/seat belt sign event to go to the dunny. And frankly if there is a turbulence risk to passengers, then cabin-crew are equally at risk and deserve the same protection (ie, stop what you are doing and strap in).