1) Thanks for the tip ref using the power button to end calls
2) I used Screbill for couple of days but ended up 'powering up phone/ overheating' while in my pocket
3) This is a wonderful site for giving and getting information--I thought that was the reason for the site????
There is a proximity setting in the build prop, actually in two places that can be edited. By default they are set to 460 (milliseconds), I changed mine to 1 on both areas. I do notice an increase in the speed of it coming back on.
At this point I am pretty aware of where the end call button is so I just push right there if it is delayed coming back on for some reason and that usually ends it right away.