I know this will never happen, but I would like to have the ability to update a theme and plugin via the installer. One of the nice things about Joomla is that you can do that. There is no need to uninstall or tell a user to use FTP if the theme or plugin has no method to handle 1-click updating.

I would also like to add....stop the madness of having to click publish twice (or more) with the block editor on new posts or having to click Update multiple times when updating.