I lack the way to manage my content in a proper way in ArcGIS Online.
For example it's not possible to create a nested folder structure. This could be usefull of you work with several WebMaps in one folder.
Furthermore it's not possible to work with an expire date. This could be usefull when you have content into a certain folder which, in accordance with the maintenance contract with the client, wil be expired after a date.
It would be great if Esri offers the possibility to organize your own content in a better way!