Yes they do.
they have poor IQ, slow AF and a **** poor tiny sensor that is only useful outside at day time.
Yes, they aren't as good as 'proper' cameras but they aren't rubbish. They're capable of producing some excellent shots.
Most people don't have a 'proper' camera with them at all times, which is why having a good one on a phone is useful.
Google to fix what? Its up to the developers who made the android apps to fix it, not google.
They work fine on the Galaxy phones... doesn't matter who is at fault. That's the current situation, it's a huge black mark on the HTC One.
Google introduced a "standard" design for ICS and above and its up to devs to implement that standard.
Google are the ones who have apparently forced HTC to remove the option to remap the back button to the menu button... so they're a large part of the problem.