Wouldn't it be cool to be able to copy & paste some configurations parameters like filters and objectives across different accounts/properties/views?
GA: Add ability to hide columns of data in GA reports, for use in screen capturing reports where you just want to show select columns.
Allow users to add rich annotations (with formatting and attachments) and sync them across GA, AdWords, GTM and Data Studio.
Also automatically create annotations when a new GTM version goes live, or when an AdWords campaign is launched, etc.
This will be a subscriber-only feature.
Add a button in the GTM preview pane to leave preview, not just minimize it, so it's not necessary to login to GTM to leave preview
Google's way of exiting preview is either going back to the GTM Container and doing "Leave Preview Mode" or when using a shared preview link, reload that link and click on "Exit preview and debug mode" - both methods aren't very practical... so now you have a nice and handy "Exit Preview" button. It will simulate what the shared link method does and get you out of preview for the current container.
Customer support service by UserEcho