Kdenlive is one of the best video editors I have ever seen and I would use it and the industry would adopt it if these tools are added.
-Stereo audio editing
These are the final things that I believe are required. I know you are trying to make it as user friendly as possible but maybe in settings you could change the tool palette in the bottom right. I am sure people will disagree with me so if you do post what the most important features for you would be.
Keep up the amazing work!