aijws

1-the phone shutting down due to high heat

2- the battery running down too quickly

3-no high resolution, high power, low light zoom on the telephoto lens

These are all things that are supposed to be improved with the new chipsets being offered by Apple this year and next. 

2nm next year should help with cooling and battery life. 

New Camera Chips and lenses should help with Telephoto Zoom this year, and hopefully better low light performance with video in Telephoto. 

You can never have too much cooling, battery capacity, camera features or display improvements!