I very nearly have a full proof of concept, as soon as I do I'll make the repo public. Future proofing is part of my aim, but it's mainly driven out of the frustration of not being able to use all the lovely modern JS features I can use everywhere else. The gist is this: I'm using a web component - because it's an HTML element, AngularJS automatically assigns it $scope. That means for my property editor I can simply get/set this.$scope.model.value in my web component. I'm hoping I can get the services I need out of Angular's DI container directly - I'll abstract this at some point so I can just drop in the new back office APIs instead. I don't need any for this package, but, UUI components are already in the back office and "just work" with this approach.