Checkout https://github.com/vega/voyager
Vega is descriptive version of d3. We find it hard for debugging and creating complex viz.
Vega-lite is concise and more intuitive version of vega though.
However Muze was created to start directly from data, creating layout, composable layers, automatic cross interaction and a robust interaction mental model. Muze is inspired from VegaLite-InfoVis and Snap together viz paper.
Vega-Lite paper and layered grammar of graphics are the biggest motivations to write Muze. Vega-Lite is still my goto viz library for my ipython and JS work. Hence there are healthy intersections between vega-lite and muze terminologies and concepts.
Would definitely love to check new development.