There should be a "Marketo Inspector" that allowed users to search across all Marketo assets, not just campaigns. Similar to campaign inspector, it would be one place where you can view all assets in one place and search or filter them based on asset type or different attributes.
For instance, you could search for
- Emails by subject line
- Landing pages by URL
- Forms by fields used
- Forms by follow-up page setting
- Campaigns by specific values inside the flow steps
- Programs by tags, channel or program status
This would be extremely useful for admins and users to be able to manage and audit what exists in a growing Marketo instance.