"But he obviously has not done much or any debate prep on these questions despite the fact he knows they are coming and that this is the only thing holding back many potential supporters. "
My God we've been at this for four years and does it dawn upon anyone that's exactly what he truthfully believes?
Debate coach, speech coach, blah, blah blah. How many times have we heard this? At this point I've come to realization that RP doesn't particularly care nor allows himself to be coached on anything, otherwise he would lot smoother in his presentation. He's going to tell it the way he sees it and if you don't like it, you don't vote for him. And many don't. But many do because he tells like it is.
Don't talk me about slick politicians when you are all supporting perhaps then most unpolitical major party candidate since Eugene McCarthy (My Lord what would he say about debates like this?) for those very reasons. At least RP never had a brain fart so bad he couldn't remember five cabinet departments or spoke Mandarin or bet someone $10,000 from of his personal bank account. For not being polished, he sure has never made gaffes like that.
I think you'd all save yourself a lot of energy and piece you just accept it. No amount of banging the keyboard or yelling at the TV is going to change things. If hasn't after this long, it's not going to now.