Using liveview as root layout

Hello,
currently I have an application that uses liveview mostly. At the current moment I have popup menu with some other buttons that are handled in javascript. I wanted to refactor and change all the javascript with a liveview component.

The way I decided to move everything from app to a new liveview, and leave the app only as reference to liveview layout:
app.html.eex |> root_layout.html.leex |> other children layouts

Is there any downside to this approach? Or is it possible to refactor root layout to be liveview directly?