The goal of echarty is to provide a minimal interface, a “glue”, between R and ECharts, then let your R data lists build the chart. There are utilities included to assist with data preparation, Shiny with proxy and JS plugins. Have the full functionality of ECharts in R with minimal overhead!
Why do you think that https://github.com/Nirzaree/ShinyWebAppWithFormAndLeafletMap is a good alternative to echarty