First and foremost, it will be weaponized by the Chinese government. It doesn't have to be something as powerful as Rouge's spring. Turning enemy troops into animals? Undetectable spies?
Second it will illegal in all other countries, likely even in china. Seriously, it is water other than its effects. The potential of an unwanted curse is too great. Think date rape drug, except undetectable and you're cursed for the rest of your life.
Also note that the jusenkyo curse is also a water magnet. It will only be a matter of time before a couple experimenting with alternate forms will end up being splashed with the wrong body parts inside other body parts. Or some guy piloting a plane or operating heavy machinery will turn into a toad at a bad time.
Another effect would be an decrease in meat consumption as animal curses would abound. I mean, it would be hard knowing there's a small chance some poor sap was just in the wrong place at the wrong time.
In other words, cannibalism becomes a very real threat. In parts of the world where hunger exists, turn your old, sickly tribesman into say, a pig or elphant elephant. Yum. Kill someone? Turn him into a chicken and eat the evidence.
Finally, if there were racial springs, this would definitely help undermine racism and xenophobia, for the same reasons as sexism.
And promote bestiality... with viable human-animal hybrids. Slavery as well. Paranoia in case of spies or thoughts about suddenly finding cursed water in your aqueduct.
Just look at how Herb's people used the thing. Its ripe for abuse. And that's ONE society, with goals that, to them, are noble.
And that's not even going into the verifiable existence of magic. That alone will turn the world sideways on its head, even if the springs suddenly disappear overnight.
"So Igor wasn't kidding. Most people just ensure they won't die cold and alone by making friends...I gain superpowers and have mysterious voices tell me I did a good job. My life is a goddamn mess."
-- Minato Arisato, My Life is a Goddamn Mess