Hi Moth3r,
A data type that really would like to manage is “Images”. For example be to able list, search, filter, delete, file path, finding which materials are using an specific image and allow batch replace. Another feature that would be nice list of all the objects using specific material or image and allow batch replace for specific objects.
I did an addon couple years back for 2.79 that allowed this features SceneXtra, hopefully some of these ideas would be possible in this great addon for future enhancements.