Those system apps have dependencies that would break other software if they were removable. It's a terrible idea to allow core apps to be deleted. I agree the ones without dependencies should be removable (Podcasts), but most are essentially data hubs for third party apps. I think the best solution is an option to hide apps from view.
iCloud Drive is disabled by default and has a toggle to enable it for the speingboard. they should offer the same for "tips" and all that crap
Where is chat limited? All major countries are supported.
in Germany the live chat is only available for shopping questions