Can you not just, use a case to solve the call dropping issue, wait for the software update coming to fix the proximity sensor issue, use your phone from a fresh install to solve the battery issue and stop whining about the glass because it is as hard as apple claim?
People don't understand what hardness in a material means, its resistant to indentation forces and scratches, Materials that are hard are generally also very brittle therefore it is still going to shatter easily if the right forces are passed through it.
Apple haven't misled people as such, they've been very careful with the word they used to describe it and most people don't understand the word and material properties so have just thought oh its now indestructible and then started bitching when they find its not.