Speed is important as well as conditioning the muscles to have both speed and have a strong, solid impact on landing. Conditioning of the entire body to achieve this is the means to accomplishing this. I break it up to 3 different points. 1-practice speed drills, 2-practice performing solid/powerful impacts, 3-practice the first 2 in combinations.
All the things I do in my vids are single components. Together, they complete a puzzle. There are blocks, strikes, faints, done spontaneously and/or are interchangeable depending on the need.
I'm not sure what you mean by structure. My intention is not to dance around and chase anyone around if I'm at a point of being angry and show aggression to have to defend myself, I'm not going to stop until one of us is down.