I saw this too and am considering changing my flight in Q4 of this year to CX (MEL > HKG on its overnight 777-300ER service).
Of course, I know it'll be luck whether or not the aircraft used is refurbished or not.
I personally enjoy Cathay - have been on their business class on both the A350-900 and A350-1000 - both times good experiences.
The 777-300ER and A330-300 products are a little bit tired though, so the 777-300ER refresh will be good.