Lumen 5.2 was updated. The release notes state Views are no longer available? When I update an existing project its just updates the project. A new project installs the a new fresh Lumen install. The View packages are still there? The documentation is gone. Why is the documentation gone? Why do point releases of these products attempt to remove functionality so abruptly? Why does the author continually try to dictate what is used and how? Lumen including Views was perfectly fine. You could produce smaller faster web applications. You could control what you wanted.
One simple update and poof, your documentation is gone. Where is the roadmap? You don't want support Views? Fine. But do it gracefully please. At that this point I would never recommend using either Laravel or Lumen ( no matter how good) based on the way these products are released or maintained. Simply too undependable for long term of framework usability without part of a development team dedicated to maintaining the framework.
Lumen is basically lightweight Laravel. Taylor's original intention for Lumen was to use it as an API layer and backend job processing. These changes are a step in that direction. The new middleware group improvements to Laravel 5.2 will allow you to separate the middlewares that are loaded for API and view routes, making them as efficient as possible.
I'd suggest just switching to Laravel 5.2. All of your code should be portable.