Wouldn't it be cool to be able to copy & paste some configurations parameters like filters and objectives across different accounts/properties/views?

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.

This would be especially useful in regex tables when I want to insert a new rule somewhere in the middle of list. If drag and drop is too much of a hassle, some other solution of rearrangement would help, like buttons "move up" and "move down"

Create a multi-purpose, rich UI to diagnose all tags, showing detailed dataLayer values and events - think of it as a next generation WASP tool. Advanced features will include visualization of tags calls hierarchy, compatibility to dataLayer, ability to block or alter requests, data dictionary, etc.

Please comment with suggestions of what you would like to see in a powerful tag debugger.

This will be a subscriber-only feature.

I'm cleaning up several GTM containers and one of the most inefficient uses of time is having to click in to 100s of redundant tags/ triggers/ variables individually to delete them one at a time - it would be great to be able to select multiple from the appropriate lists and simply click "delete" once.

Allow copying of calculated fields from one data source to another

When looking at a GA report that has a time series graph, show control limits, trends, and maybe forecast

It would be useful to mass delete client id from the user explorer report. This would be useful when PII enters into analytics or when a user ask for its data to be deleted.

https://developers.google.com/analytics/devguides/config/userdeletion/v3/reference/userDeletion/userDeletionRequest#resource

https://www.amazeemetrics.com/en/blog/how-to-delete-visitors-in-google-analytics-to-be-compliant-with-gdpr/

By adding 

$('.searchcontainer').css("display", "block");

to the CSS in the Rollup Dimensions/Metrics Mapping you can add a search box to the dropdown

before:

after: