I think people need to put politics aside and try to look at the debate from the mindset of an average American. Trump responded to each point mostly coherently and defended himself on the basis that he is and has been an effective business leader while Clinton has been directly involved in international affairs and has not been able to enact the change she wishes to make happen. That makes sense to someone who knows nothing about the middle east, except that we are at war with multiple countries over there for no good reason. And his 'deal' on releasing his taxes in return for releasing the e-mails makes sense to someone who has no grasp of confidentiality, or believes there is an ongoing conspiracy protecting Clinton.
His rhetoric range true with his constituents, the low information voters, and he will probably gain more support from the debate. I don't want him to be elected, but calling this a knockout in favor of Clinton is foolish, and exposes the common hubris that appears among supporters of the status quo. Clinton needs to do more to show how bad Trump's tax plan is, expose his lack of foreign policy experience, and continued waffling on issues. Obama was effective at pointing out problems and offering solutions. It is harder to get people to support more of the same when people's lives aren't perfect (and never will be) and someone is offering something new.