I had the chance to try again Laravel 5 and here are my two cents about route annotations:
Route annotations can save you a lot of time in projects or the part of the projects where the URIs are not crucial, for example: Admin panels, APIs, etc. You need to create a method in a controller and you can add the route really quickly above the method definition using less characters, so it saves some time and doesn't distract you of your task (implement a new action).
But in some projects where you are worried about SEO and the routes order really matters and in complex projects where you are trying to implement several languages and domains / subdomains, I find the old way (routes.php) to be better, because you can implement logic, variables, etc.
So I could even combine both approach in a single project: route annotations for the admin panel, and routes.php for the public interface.
Taylor removed the routes.php file but it's really easy to add it again or distribute your routes in another way (for example a routes folder).
Also @JeffreyWay pointed it out that they won't remove the routes.php option, so I guess it's ok, everyone can decide wether it's more convenient using annotations or not.
P.S.: I knew subscribing myself to this topic was a really bad idea.