Improve Advanced Search in Confluence

The current Confluence Advanced Search provides users with limited fields for them to look for pages/spaces. It would be useful to provide users with the ability to configure the fields that they're looking for, instead of providing default fixed ones.

Screenshot: Users cannot choose which field they'd like to search for, besides these default ones

A suggestion, to improve this search would be to provide users with the ability to use CQL (Advanced searching using CQL) via the UI.

This would provide users with the same flexibility as Jira to search for pages, spaces, labels.

e.g. User would like to look for the creator of a page, however, the field Creator is not present on advanced search and using the default Contributors field also returns pages that were edited by said user, making this field not particularly useful for this situation.