Your weight stays too far forward during the pull, which is at least partly why you start the second pull too early and why it's not as explosive as it needs to be.
If I'm reading what you said about a vertical position correctly, no. Stay over the bar until it's at mid to upper thigh. Trying to get vertical sooner will slow you down, both in terms of the actual extension speed and the change of direction at the top.
Get your weight back a bit more off the floor and keep it back all the way up the pull. Push down w the legs and open the hips more to finish your extension.