I just refactored a project I’m working on to address precisely this issue. I added a new function to myapp_web.ex, so now I have both view and accounts_view:

def view do
    quote do
      use Phoenix.View,
        root: "lib/quizdrill_web/templates",
        namespace: QuizdrillWeb

      # Import convenience functions from controllers
      import Phoenix.Controller,
        only: [get_flash: 1, get_flash: 2, view_module: 1, view_template: 1]

      # Include shared imports and aliases for views
      unquote(view_helpers())
    end
  end

  def accounts_view do
    quote do
      use Phoenix.View,
        root: "lib/quizdrill_web/accounts/templates",
        namespace: QuizdrillWeb

      # Import convenience functions from controllers
      import Phoenix.Controller,
        only: [get_flash: 1, get_flash: 2, view_module: 1, view_template: 1]

      # Include shared imports and aliases for views
      unquote(view_helpers())
    end
  end

Then, I created a new accounts/ folder at lib/myapp_web/accounts/ and I created three directories inside it: controllers/, views/, templates/. So my directory structure inside myapp_web looks like this:

myapp_web/
├── accounts/
│   ├── controllers/
│   │   ├── user_auth.ex
│   │   ├── user_confirmation_controller.ex
│   │   ├── user_registration_controller.ex
│   │   ├── user_reset_password_controller.ex
│   │   ├── user_session_controller.ex
│   │   └── user_settings_controller.ex
│   ├── templates/
│   │   ├── user_confirmation/
│   │   ├── user_registration/
│   │   ├── user_reset_password/
│   │   ├── user_session/
│   │   └── user_settings/
│   └── views/
│       ├── user_confirmation_view.ex
│       ├── user_registration_view.ex
│       ├── user_reset_password_view.ex
│       ├── user_session_view.ex
│       └── user_settings_view.ex
├── controllers/
│   └── page_controller.ex
├── templates/
│   ├── dashboard/
│   │   └── index.html.heex
│   ├── layout/
│   │   ├── live.html.heex
│   │   ├── _user_menu.html.heex
│   │   ├── root.html.heex
│   │   ├── admin.html.heex
│   │   └── app.html.heex
│   └── page/
│       ├── index.html.heex
│       └── dashboard.html.heex
├── views/
│   ├── error_helpers.ex
│   ├── error_view.ex
│   ├── layout_view.ex
│   ├── page_view.ex
│   └── dashboard_view.ex
├── endpoint.ex
├── gettext.ex
├── telemetry.ex
└── router.ex

The controllers and the views can be moved into the new directories without affecting anything, but if the templates are moved then they will be in the wrong location – so I have edited each of the view files so it is an :accounts_view rather than a :view, following the adjustment I made to lib/myapp_web.ex. For example:

defmodule QuizdrillWeb.UserConfirmationView do
  use QuizdrillWeb, :accounts_view
end

Now I have everything having to do with user accounts under the accounts/ directory and out of the way.

I’d appreciate any feedback, incidentally – the one thing I don’t like about this approach is the code-duplication between the view and accounts_view functions in lib/myapp_web.ex – I’d prefer to only change the root directory for the templates rather than copy-paste the whole function in the way that I did.