You could just add any content what you want in it. If you want to use original layout just remove get_header( 'shop' ); ?> and <?php get_footer( 'shop' ); ?> from the file since you don’t need them.
I’m not sure if the way I did my templates is the best practice or not, but I wanted to use blade templates on my layout files so I just copied all the WooCommerce’s view files (.php) that I wanted to change to the resources/views/woocommerce folder. After that I erased everything in them and added <?php echo App\Template('file_name'); ?> to them.
So now my theme overrides original WooCommerce files since WooCommerce first looks for those files from theme and if they exists it uses them. When WooCommerce uses my theme’s .php it gets the corresponding .blade files. Those blade files then defines how my site will look.
To be honest I don’t actually use <?php echo App\Template('woocommerce'); ?> anywhere in my theme. And my archive-product layout is only used for categories page, tags page and search results page. I made custom frontpage layout, which might not be the exact WC way (because now I don’t have specific ‘shop’ page and link to the shop page in wp-admin is disabled) 
Here is how my archive-product looks like:
archive-product.php (resources/views/woocommerce):
<?php echo App\Template('woocommerce/archive-product');
archive-product.blade.php (resources/views/woocommerce):
@extends('layouts.base')
@section('content')
{{-- Variables --}}
@php
global $wp_query;
$total = $wp_query->found_posts;
$cat = $wp_query->get_queried_object();
$taxonomy = $cat->taxonomy;
$tag_img = get_field('kuva', $taxonomy . '_' . $cat->term_id);
$archive_img_id = get_woocommerce_term_meta( $cat->term_id, 'thumbnail_id', true );
$archive_img = $tag_img ? $tag_img : wp_get_attachment_image_url( $archive_img_id, 'full' );
$slider = get_field('slider_shortcode', $taxonomy . '_' . $cat->term_id);
@endphp
<section id="category" class="container">
{{-- Category Header --}}
<header class="header row">
{{-- Category Heading --}}
<div class="heading col s12 center-align">
<h1>{{ woocommerce_page_title() }}</h1>
</div>
{{-- Category Image --}}
<div class="image col s12">
@if($slider)
{!! do_shortcode($slider) !!}
@else
<img src="{!! $archive_img !!}" class="responsive-img category-img" >
@endif
</div>
{{-- Category Description --}}
<div class="desc col s12 center-align">
{!! term_description( $cat, $taxonomy ) !!}
</div>
{{-- Category Product Count --}}
<div class="count right-align col s12 right">
<span>{{ $total }} {{ __('Products', 'textdomain') }}</span>
</div>
{{-- Divider --}}
<div class="divider col s12"></div>
{{-- Category Product Sorting --}}
<div class="count right-align col s12 right">
@php
do_action( 'woocommerce_before_shop_loop' );
@endphp
</div>
</header>
@if ( have_posts() )
{{-- Products --}}
<section class="row">
<ul class="products-in-category">
<?php while ( have_posts() ) : the_post(); ?>
{{-- Product --}}
@include('woocommerce/content-product' )
<?php endwhile; ?>
</ul>
</section>
{{-- Pagination --}}
@include('partials/pagination')
@elseif ( ! woocommerce_product_subcategories( array( 'before' => woocommerce_product_loop_start( false ), 'after' => woocommerce_product_loop_end( false ) ) ) )
<div>
{{ wc_get_template( 'loop/no-products-found.php' ) }}
</div>
@endif
</section>
@endsection
(Btw I use materialize css and advanced custom fields in this project.)
Basically you could just pick the parts you like from the original WC template file and put the straight in the archive-product.php but I liked to customize make almost every template so I just did this to the files I liked to change and then put custom code inside the blade files.
My way is not the best way to do things but it works, and right now I haven’t found a way to get WC to look for blade files directly so I had to add both php and blade files (WC calls .php file from theme which calls .blade file).
Some of the WC template files need variables to pass in them to get different functions to work so if you run in to problems you could just add the variables in the .php file like I did for cart’s cross-sells.php:
Ex. If you use original layout for cart’s cross-sells.php but wanted to benefit blade’s structure you can:
In cross-sells.php (resources/views/woocommerce/cart)
<?php echo App\Template('woocommerce/cart/cross-sells', [ 'posts_per_page' => $posts_per_page, 'orderby' => $orderby ]); ?>
I haven’t found a way to use blade controller to pass data in my WC templates and I will keep looking for a way to directly call those blade files so I can ditch .php files from my views, but until then this is the way I got it working.
Hope this makes any sense and helps you and the others in their way to build WC themes with Sage! 
