How to alter rendered commerce line item on order entity view?
I know it is a bit late, but here is what I did to modify the line items on an order view.  

For my example, I wanted the type field to be displayed, so I altered the view of the commerce_line_item entity using hook_views_pre_view(&amp;$view).  Here the code that have:

switch ($view-&gt;name) {
    case 'commerce_line_item_table':
        $view-&gt;display['default']-&gt;handler-&gt;options['fields']['type']['exclude'] = FALSE;


This is all I needed to do since type was already there in the commerce_line_item_table view defined in commerce_line_item.views_default.inc, but if you want to add a field to the view, it would look something like this

        $view-&gt;display['default']-&gt;handler-&gt;options['fields']['type']['id'] = 'type'; 
        $view-&gt;display['default']-&gt;handler-&gt;options['fields']['type']['table'] = 'commerce_line_item';          
        $view-&gt;display['default']-&gt;handler-&gt;options['fields']['type']['field'] = 'type';
        $view-&gt;display['default']-&gt;handler-&gt;options['fields']['type']['relationship'] = 'commerce_line_items_line_item_id';             


Please note, that when you later the view for the user/%user/orders/%commerce_order page, it also alters admin/commerce/orders/%commerce_order/view since they both use entity_view