Any issues in WordPress 5?
It seems like the Block editor no longer breaks CiviCRM shortcodes. But you do lose the quick CiviCRM shortcode button.  

The classic editor plugin with Wordpress 5.0 makes the move easier. Personally we set the Classic Editor as default and allow users to switch to block with the understanding that they will have to generate the shortcode for civi elsewhere or memorize the shortcode params. ;)