I might do something like React JSX, maybe called ERX. I do think it opens up a hole though in doing business logic the wrong place. I know in Elixir it might be easy to do with the meta programming stuff.
In regards to business logic, I think you just need to be strict when writing your application with the idea of what a 'view' is. Although React may seem like you are violating separation of concerns, in reality view logic and templates are already tightly coupled.
