Our own take on this is https://github.com/okcontract/cells where we try to stick as close as possible to the spreadsheet analogy. We're using it to build a very complex web app and it's doing marvels.
One of the best FRP environment for JavaScript is/was FlapJax: https://en.m.wikipedia.org/wiki/Flapjax, which incorporates both the primitives and their operations.
If you simplify out the event stream primitive from FRP, what you are left with is not FRP.
There were enough true FRP libraries around not to implement another one. We think cells is a sweet spot where we get most of the benefits of functional programming and reactive programming while simplifying the concepts from the original paper from Elliott and Hudak.
But this pales in comparison to the world's most successful FRP application, the spreadsheet.