Hi Daniel,
Yes, drilling down by double click is not supported in IBP Add-on, it has to be executed through the Planning View menu.
In brief, these are the common features I know:
1. EPM Formatting Sheet that allow you to format and protect your planning view.
Supported features are described in the Application help
Using the EPM Formatting Sheet - SAP Integrated Business Planning - SAP Library
and some of them also in the document 'How to transfer delivered templates..' under note http://service.sap.com/sap/support/notes/1790530
Last time when i checked the Hierarchy Levels part of Hierarchy Level Formatting they were not supported.
The rest available features can be found under EPM Sheet Options and EPM edit report
2. EPM Sheet Options: autofit that will apply to the area of the excel sheet that is part of the planning view only, repeat headers, member recognition, no data or zero values - remove or hide options, different formatting options etc
3. EPM Edit report mainly use for adding Local Members, shifting report layout and override the dimensions' name(useful during demos when SAP standard models are used)
But there is no guide that list them all, as it is for the EPM Add-In.
Regards
Alecsandra