Xenforo Development Team should Consider this issue.
** Another thing - FTP client takes longer time to upgrade Xenforo, during upgrading 'Forum' freeze with Xenforo default message. so is there any way to reduce time for upgrading ?
Wordpress has auto update installation procedure from ACP as well it doesn't change the logo of the site after a new update. If possible Xenforo can add such options, so that it will be more user-friendly.