Vegas team can add a "video progress" like "transitions progress" to the event.
Vegasaur's tweener can add all kings of curves to "transitions progress" and can make many MG resaults:
But many FXs are in event FX, so if Vegas team can add a "video progress" to the event. It will make more MG resaults working with tweener of vegasaur.
And "video progress" can be more convenient than "event velocity".
Velocity is hard to specify the last frame. However "video progress" has specified first frame and last frame before adjust.
And the Y value of event velocity is play speed of event. But "video progress"'s Y value is progress. The max value of "video progress" is the last frame. This make "video progress" more convenient than "event velocity".