She had probably the single most effective moment in a debate as well. Unfortunately, I think her campaign wasn't prepared to capitalize on that moment. I think her lead campaign staff didn't have an effective plan and were too scattershot in their strategy.
That doesn't really mean much about how she would campaign in this cycle though. She will have a much better staff and a much less complex goal. Figuring out how to strategize across multiple states against multiple candidates in a nomination is much harder than running against one guy nationally.