There's no need to argue. Ben, you can continue working on the new icon set, and when you are ready we will ship your icons.svg alongside the old one, so people can choose whichever they like. Trent, the same for you: you are welcome to develop a set of icons that work best for your black background, and we'll ship them also. When there's at least one complete set besides the old one, we can make a preference with a UI to choose one of them on load.

As for me, I prefer the crisp, bright, and laconic style and, when I create new icons in my set, I will continue developing that style. Everyone can use what they like.