Hillary's strong suit is in debate and I'd assume that's what her campaign is really leaning on to get her the win in November. We haven't seen how her and Trump handle a debate stage together, but if she allows him walk all over her, then I'd agree with you.
The debate will be pretty high stakes.
How Trump communicates to his weaker supporters and undecided will, of course, be crucial. He's underrated as a communicator. I remember a piece earlier this year by Byron York who neatly explained Trump's communication genius. He seems to be rambling, but he is able to (A) touch on the bullet points his crowd comes for, and (B) dish out a helping of celebrity gossip, which crowds of all kinds eat up these days. That worked well in the nomination process. The debates are another animal, but who's to say Trump couldn't have his "There you go again!" moment.
For all the folks who want to blame "sexism" for Hillary's unpopularity, let me suggest that she's the Democratic model of a cross between Richard Nixon and Mitt Romney. Ruthless and tone-deaf and unattractive when these qualities come to the surface. Both of these folks were smart, but Nixon was secretive and ruthless and Romney is a tone-deaf elitist. Hillary combines these two qualities and wonders why she's unpopular. She's as genuine as when Mitt Romney, on a Southern swing, spoke about his love for "cheesy grits". (Again, out of the wellsprings of the heart . . .)