Hello Ricardo,

Thank you for posting. Please use the following code to make featured members tab as default.

/**
 * Set default activity directory tab for BuddyPress
 */
function buddydev_custom_set_default_members_directory_tab() {
	// If user is not logged in or
	// If the scope is already set, do not do anything ok.
	if ( ! function_exists( 'bp_featured_members' ) || isset( $_COOKIE['bp-members-scope'] ) ) {
		return ;
	}

	// additional check for members dir
	if ( ! bp_is_members_directory() ) {
		return ;
	}

	setcookie( 'bp-members-scope', 'featured',null, '/' );
	$_COOKIE['bp-members-scope'] = 'featured';
}
add_action( 'bp_template_redirect', 'buddydev_custom_set_default_members_directory_tab' );

To make feauted tab as first position. You have to override members/index.php template.

just copy the template from plugin directory to active theme directory path like

buddypress/members/index.php

and put the action

	<?php

				/**
				 * Fires inside the members directory member types.
				 *
				 * @since 1.2.0
				 */
				do_action( 'bp_members_directory_member_types' ); ?>

above the following line

<li id="members-all">

Please let me know if it works or not.

Regards
Ravi