I have tried blender within the last year. There is no doubt that it is capable of many things beyond 3D, such as motion tracking, digital makeup and the aforementioned video editing, but it is a classic case of jack of all trades and master of none. Video editing in blender is downright painful. Anyone used to editing on even basic lite versions of any commercial editing software will start pulling hair. Too many free options available to bother IMHO to bother. If I were going the freebie route I would use Davinci Resolve for editing and color grading ,Fusion for compositing. The learning curve for Fusion is steep, but Blender is just as steep and not nearly as powerful for compositing and keying. I would keep Blender around for 3D modeling and animation though.