The CX arrival lounge is a pretty miserable experience and not at all aligned with the rest of the CX lounges. Poor food choice, mega long wait for the showers, no natural light and not good air quality.

I've only peered through the door but the PP lounge looks better!

More generally for oneworld I've found the arrival lounges are much less consistent about access than the departure ones.

There is an old Oz biz traveller article here that talks about it a bit.