Routing to callback functions in WordPress - 01

I like the way routes to endpoints can be set in Laravel: it's clear and logic and allows doing clean things like RESTful URLs in a way WordPress will sometimes not offer.
I've recently run into the need to add archive pages to the menu and got stuck with either a workaround, like adding an empty page and applying an archive template to it, or using some plugin to do so.

Can I route?

I'd like to be able to write an URL like /posts to get the posts archive and something like /posts/some-post-title or /posts/21to get a specific post.
While WordPress native Rewrite API is the way to go it seems a little daunting at first and led me to more OOP approaches and solutions like WP-Router.

I can route somewhat

After installing WP-Router and setting up a plugin to use it in its main class I've hooked into the right action

class Main
{
    public function __construct()
    {
        add_action('wp_router_generate_routes', array(
            get_class() ,
            'addRoutes'
        ));
    }

to map the route to a function callback and be able to control the output with it

    public static function addRoutes(\WP_Router $router)
    {
        $router->add_route('hello-route', array(
            'path' => '^hello/(\w*?)$',
            'query_vars' => array(
                'name' => 1,
            ) ,
            'page_callback' => function($name){
                echo "Hello $name";
            },
            'page_arguments' => array(
                'name'
            ),
            'template' => false
        ));
    }
}

the function is outputting to the page and using that route parameter to show an output, once the plugin is activated and I enter the /hello/world URL the message, and that alone, is shown on the page [caption id="attachment_1030" align="aligncenter" width="1024"][](http://theaveragedev.local/wordpress/wp-content/uploads/2014/05/2014-05-27-at-18.28.png) Hello world output[/caption] please note that any theme layout and template is ignored and not shown on the page; the only output is the one that the callback function, a closure here, is producing.
In a Laravel-like fashion it allows using functions to show content on the page. The interface the plugin offers, though, is not that easy to grasp.

Next

I like WP-Router so far and would like to create an adapter/wrapper class around it to model its interface on the one used by Laravel like

Route::get('/landing', function(){
        echo 'Hello world';
    });

That's possible using a function like

$router->add_route('root-route', array(
    'path' => 'landing',
    'page_callback' => function(){
        echo "Hello world";
    },
    'template' => false
));

but that sure is more code than Laravel's solution.