If looking for PR fares ex Australia to be cheaper than currently, the airline typically has a sale to celebrate Philippine Independence Day that's on Monday 12 June 2023.
I subscribe to its emails but strangely don't always find sales come via email. One must to look up Facebook or the PR website.
A guess is that this sale may be publicised from mid May 2023, although the forthcoming commencement of low cost competitor 5J's flights to MEL may hasten.
A friend travelled MEL-MNL on Friday 3 March (PR210) and said the A333 was almost full, which surprised as it's not school holidays and still a few weeks before a peak travel period in Easter.
As it's a cheaper J class origin than SIN, BKK or KUL, MNL is an excellent starting location for an open jaw J return to London and back from Europe (avoiding horrendous UK air passenger duty and killing two birds with one stone). Airlines such as once good but now allegedly mediocre EY, excellent but not well known WY and overpromoted EK and QR fly from MNL to many UK/;European destinations. So does GF that by review is not as good as WY. If doing this, allow at least 36 hours in MNL each way so that if anything goes wrong ex Oz or ex Europe, you still have a buffer.
WY's Apex Suites layout on the B789s offering direct aisle access is way superior to EK/QR's dated B773s ex/to MNL-Middle East. PR's A333 J class is not shown in mattg's article above but it's a good, pretty standard, comfortable 1-2-1 layout, Thomson Aero IIRC. Every second window seat offers more privacy so look up SeatGuru.
I am hardly an expert but the catering on PR and WY in J seems to more than meet my expectations. In comparison some meals served on cost-cutting EY ex MNL or other origins look decidely average at best.
Be aware PR uses the clinical, unattractive T2 with a mediocre lounge for most international flights including to/from Australia but the ME airlines above use either T1 (WY and GF, also with substandard lounges) or T3 (EK and from memory QR, where the lounges should be better). But for me, onboard comfort is much more important.
There are banks offering quite reasonable FX rates at the various terminals, so obtain Philippine pesos there instead of at ripoff Australian rates.