I think her wanting another debate is bluster. There is nothing she can say or do that would make it better for her. The choice now is so completely obvious.
Yes, yes and yes.
Spelling out a few of her policy proposals more wouldn't hurt, but the debate format doesn't seem well suited to that.
Trump let his ego rule, just as expected. If he accepts a second debate he is toast. His better strategy is to decline arguing she is not a candidate of substance, just insults.
Of course so is he but he has a record , she does not.