My failed attempt at getting dynamic_sidebar() to work with switch_to_blog()

gistfile1.php

<?php

if ( !is_admin() ) {
    add_filter('sidebars_widgets', 'ichannel_load_parent_widgets');
}
/**
 * Filter loads sidebars from the parent site if current site's sidebar is empty.
 * Also loads widgets from parent site into current site.
 *
 * @param $sidebar_widgets array
 * @return array
 */
function ichannel_load_parent_widgets($sidebar_widgets){

    global $wp_registered_widgets, $_wp_sidebars_widgets;

    $parent_sidebars = get_blog_option(PARENT_SITE_ID, 'sidebars_widgets', array());

    if ( $parent_sidebars ) {

        foreach ( $parent_sidebars as $sidebar => $widgets ) {

            # ignore wp_inactive_widgets because inactive widgets can't be displayed anyway
            if ( array_key_exists($sidebar, $sidebar_widgets ) && $sidebar != 'wp_inactive_widgets' && empty($sidebar_widgets[$sidebar]) ) {

                $sidebar_widgets[$sidebar] = $widgets;

                if ( is_array( $widgets ) ) {

                    foreach ( $widgets as $widget ) {

                        # there might be a better way to do this, but I don't know what it is, so I'll brute force it
                        $pieces = explode('-', $widget);
                        if ( count($pieces) == 2 ) {
                            $option_name = 'widget_' . $pieces[0];
                            $id = $pieces[1];

                            $found_widgets = get_blog_option(PARENT_SITE_ID, $option_name);
                            if ( array_key_exists($id, $found_widgets) ) {
                                $wp_registered_widgets[$widget] = $found_widgets[$id];
                            }
                        }

                    }

                }


            }

        }

    }

    return $sidebar_widgets;

}

function option_from_parent($option) {

    add_filter("option_$option", 'load_option_from_parent_site', $priority = 10, $accepted_args = 2);

}

function load_option_from_parent_site( $value, $option ) {

    return maybe_unserialize(get_blog_option(PARENT_SITE_ID, $option, array()));

}

option_from_parent('widget_widget_sp_image');

add_filter('option_sidebars_widgets', 'sidebar_widgets_get_from_parent');
function sidebar_widgets_get_from_parent($sidebar_widgets) {

    return $sidebar_widgets;

}

?>