They screwed up during the start of 2.2 when they allowed retainers to solo ex primals and T9.
Getting ex parts was one thing but getting a drop from T9 when no one has even cleared it ( back then ) was a pretty dumb move on SE's part.
That then resulted in ppl selling it for millions ( smart ppl ).
Ppl then bought it and that lucky player got a few millions for what, a couple of gil if you convert seals into gil ratio.
Luck like that was bogus and made no sense at all.
So if ppl had 4 retainers that'd = to 2 more chances in recieving that fragment drop.
Other than that there's really no P2W atm.