Great question — answering as the UphillTech team:
Throw this into your functions.php: function clear_yoast_metadesc( $metadesc ) { return ''; } add_filter( 'wpseo_metadesc', 'clear_yoast_metadesc', 99, 1 ); If you set the $metadesc to empty like that, it won't be echoed. BTW, bulk editing is very hard on my to-do list, so you would be able to switch back completely :)
Full answer by Joost de Valk: https://wordpress.stackexchange.com/a/29546 (CC BY-SA 3.0).
Want it for your business? UphillTech.