I've also occasionally used PR to 'beyond Manila' (different from the OP's case since same airline, and thus far for me, no transferring terminals) and it's been most satisfactory. Only once have I used it out of BNE (not with the new lie flat in J A321neos) but have used it a couple of times ex or to SYD and more than that to or from MEL.
I don't even consider 5J from MEL or SYD to MNL (or beyond) as for flights of above two hours, I dislike its cramped A333 seating (no recline) while QF can have staff who treat travellers as interruptions. QF's punctuality on the A333/A332 international Asian routes is variable to put it politely, even though its base is Australia. For anyone outside of SYD, it means a transfer there...no thanks.
The PR service on board usually beats QF and PR has regular sales so outside of school and Christmas/Easter hols, there's no need to pay high fares if one is lucky enough to be able to arrange travel well in advance. Many AFFers are savvy enough to do this.
Using lesser known airlines like PR, CI and BR (to name a few) has much to recommend it. Of the three, PR is often cheapest and BR the most expensive. BR has very limited flights into and out of Oz, but PR is the most frequent of the three. I'll put up with some inconvenience in MNL if it means greater comfort and better service at a lower price on board.