I've been working on https://deja-vu.junglecoder.com which is an attempt to build a JS toolkit for HTML-based doodads that shares some ideas with this.

I don't quite have proper reactive/two-way data binds worked out, but grab/patch seem pretty nice as these things go. Also, the way this uses templates makes it very easy to move parts of the template around.

It's also largely injection safe because it's using innerText or value unless told otherwise.