Honestly, this entire topic just makes me shake my head at the sheer disappointment of both what's happening to this community (nonsensical witch hunts against anyone who dares to wrong a person in the past, does something they don't like, or simply has the "wrong think" of someone else), as well as a gross misunderstanding of how computer programs work.
I mean, the Tweaker is, at it's core, literally no different than the Final Fantasy XI Windower. Ironically, just like the Tweaker is getting right now, the Windower also had it's fair share of people like Coil and Same who insisted it's creators were malicious, evil human beings hell bent on kicking puppies and cheating through the game. In reality? The Windower, like the Tweaker, was designed to fix the short comings of Square's ineptitude when it came to creating a PC game. All the Windower originally did was, as it's name implies, launched the game outside of Play Online so you could minimize it without the game crashing (because welcome to how SE handled their anti-cheating methodolgy back the old days).
Now yes, one big difference between the XI Windower and the Tweaker is that the Windower eventually went on to be rebuilt as a way to incorporate addons and UI interfae tweeks to XI, which of course lead to even more witch hunting of people claiming Windower users were cheaters, yada yada yada. Long story short - SE has all but openly accepted the use of the Windower, so long as it does not give a player an unfair advantage, despite the game's ToS saying that the use of the Windower should lead to an outright ban.
The Tweaker is, like the Windower, a reconfigured launcher that fixes the faults of PSO2's archaic launcher, as well as it's conflicts with things like the Windows Store, as well as let you play the game off the JPN servers. That's it, that's all it does (well, that and let you brew coffee from afar). There's no root kit installed in it, there's no crpytocurrency mining nonsense going on. The Tweaker is not, in fact, stealing your identity as we speak, and selling it off to some foreign investment firm.
Because here's the reality of it - If it did ANY of this, people would have discovered it. Computer software is not some strange alien technology that requires people to have a four year degree in astroscience to understand. If a program was stealing your information and identity, it wouldn't exactly be hard to find it. Hell, look at Genshin Impact. When the game came out, people like those in this topic were screaming from on high that because it used Denuvo, it was clearly a CCP tool to steal American information, and sell it back to their masters.
And yet...that wasn't true, at all. Because people who actually understood how software works, just knew that while Denuvo does causes issues with performance, it does not, in fact, steal information and send it to the CCP. But again, let's say it did - does anyone honestly think that after millions of people played the game, no one would notice their information leaking over to the CCP? That's just not how reality works.
AT the end of the day - I'm not defending what the tweaker's creator may or may not have done half a decade ago. If people lost money,t hat's unfortunate, but hey, that's the risk you take when it comes to investing, especially with someone who isn't super vouched for. But what I can say is that the Tweaker is not stealing your information, it is not giving people unfair advantages, and it's not some evil program that's going to bring about the end of the world. And do we really need to dredge up these childish little wars over people using Arks-Layer, or how this Discord is worst than this Discord? We're not in highschool anymore, stop acting like it.
It's a launcher modifier that can make coffee from afar, and offers a translation patch to the Japanese client. Maybe it's time to stop throwing these little witch hunts around about stuff that happened five years ago, and instead just worry about making sure the game runs properly.