For teams that have lots of merge tags currently it is not convenient to make mass changes.
Would be really great if you allow the following:
1) Export of all existing merge tags to a CSV file
2) Import of merge tags via CVS file:
2.1) When importing it allows you to replace/update the data in the existing tags (important) – It can also ask you if you want to replace or keep the old value
The CSV file should have the following columns:
custom_tag_name
merge_tag
preview_value
used_as_special_link - true or false
It will be so much more convenient to just work with the file and update something when needed