Wait.
Sony has established a rule that is 100% guaranteed to noticeably reduce the amount of profit they make?
You really thinking they're going to get a lot of profit from an undubbed One Piece game in Europe and America?
In all honesty a dubbed version for the location is pretty much expected with video games. I don't see anything wrong with this rule, it's just quality control. Like in all honesty, how many undubbed-but-translated games do you see on the market anyway?
Just because companies act a certain way does not mean that way is smart.
Companies are scared to release undubbed games. That is all. The games would still sell almost as well as they do now if they were "only" subbed (and not dubbing saves a lot of money).
The amount of people who won't buy a game because it's only subbed and not dubbed is a lot smaller than the amount of people who don't buy a game because it's only available on PSN.
While it may be true that a few people will not buy it because it's not dubbed, but A LOT of people will not buy it because it's only available on PSN.
Making your product available to as many people as possible is always the by far smartest thing.
And making your game available to less people because a tiny amount of people may not buy it is very unwise. Especially since those few people won't buy it on PSN either.
Also I highly doubt that many people base their purchase decisions on whether or not a game is dubbed, seeing how nearly any fan of the series watches it subbed and not dubbed anyway.
Those who buy the game because they're a fan of One Piece know the part of the story that is displayed here already and those who just care about gameplay don't give a fuck about whether or not it's dubbed either.