Let me start by saying, I'm not really trying to change your mind, there are plenty of handguns to pick and they all work pretty well. I'm just trying to have a discussion about something I see on gun boards a lot, that makes no sense [ETA: to me. makes no sense to me).
On any machine, a reasonable test period after repair proves that it is functioning as designed, and you can have high confidence that the fault was repaired and the machine will function as designed for it's lifespan.
It's not 100% (nothing is), but it's pretty close.
As far as why it failed, that remains to be seen, but there are enough CCP's in the world that have gone beyond 30 rounds we can be confident that it's not inherent in the design to go tits up at that point. So it's VERY likely that it's a faulty part, or faulty manufacture of something. Both are easily remedied.
That said, you started the warranty/repair process by deciding that you no longer wanted the pistol, so I doubt you can be swayed. That's why I started this part of the discussion with "I don't understand...."
Realistically speaking, from the standpoint of one that builds and repairs machines way more complicated and prone to breakage than a handgun, there's no rational reason to think that your pistol, repaired and tested, or a replacement CCP isn't just as good as you expected it to be when you bought it last week.
It's funny, because we talk in politics all the time about folks reacting to their "feelings", but that's what's happening here. You won't "feel safe" with a CCP, no matter what evidence exists that the pistol works, so you don't want it any more. I'm just amused by the phenomenon.