I've got the misaligned front facing camera issue. It seems to work ok, though.
Also, my iPhone 6 crashes frequently (I think SpringBoard crashes, as it comes back fairly quickly). I'm not sure if that's a hardware defect, but it's a 128GB model, and maybe it has to do with faulty flash memory. Hoping a software update fixes this, but as of 8.1.2 I'm stilling having the issue.
I'll probably eventually get it replaced for the misaligned camera issue, but not any time soon. It seems like people are getting replacements with defects pretty frequently. I'll wait until next year, when I imagine demand will be much lower and hopefully my chances of getting a working replacement might be higher.