Nope sorry it's not just Cathay it's Aircraft landing gear design and spoiler deployment rates.
The same on other 330's I've flown in.
You can do very little about the bogies tilting after the spoilers deploy and it's a rough thump........
Anyway, just watch ANY 330 landing next time and watch the "thump" down, I've seen many from the parallel taxyway and it's not pretty...
Easy to firstly grease on the trailing wheels but not so easy for the front.
in fact the smoother the trailing wheels contact the worse the thump later on...
Many techniques to try and stop this including sidestick de-rotation ( which I hardly ever use myself ), slightly delaying the selection of Reverse until the tilt completes or a slightly firmer initial touchdown which seems to de-rotate the bogies a little smoother giving an overall smoother result.
Either way it's no Jumbo or 777.