I'm both terrified of a Trump presidency and terrified that Hillary Clinton - a polarizing candidate with terrible charisma - will get pushed around and shouted down by Trump's short sentences and small, loud words, every time she goes into policy-wonk mode.
I think wonkiness plays a lot better in a one-on-one debate than it does in big debates, and Clinton doesn't strike me as one who will get "pushed around." I think Trump's potential downside in the debates is a lot bigger than Hillary's, so I wouldn't be worried if I were you.