I roughly understand what you mean, but what if you need to change the camera? You are probably talking about strategies where the controller controls the character, where the main role of the character is to control the camera and there is no need to switch the camera. Unfortunately, I do not really understand such games 
In my case, the character changes his appearance, abilities, controls, and the camera also changes. In my case Third person game. But your idea is very interesting, I need to think and experiment, I will definitely look at the top-down template. However, the idea of using a controller with an enhanced input is very useful, I would like to understand how to do it …