I called my local Sony store, he said they're not doing replacements on controllers because they're not covered by the warranty. Checked the exact text of the warranty in the manual that came with the PS4, and the guy is full of shit.
In any case, he told me I need to contact Amazon. Which is kind of bullshit, what are they going to do have me send back the entire working PS4 to replace the controller?
I have a second DS4 for now, luckily, but i hope Sony figures out what the problem is. And if it's related to peoples' fingers and not a production / assembly issue, then I hope they figure out the material problems, or else thousands of people will be relegated to a life of fucked up controllers.