What I really like about Angular2 is how the "directive" concept has gotten so much simpler. With a directive (component) now being an ES6 class, it has allowed Ionic2 to do some really cool things to simplify code. What used to be $scope is now the component's instance of this, which again fits well as to how code and views are wired up together. Ionic v2's development is coming along great and we're very pleased with the results so far. We'll keep the community posted when it's ready for a developer preview.