I would like to suggest an extension to the ScriptColumn feature. Being able to dynamically assign configuration values.
There are a few ScriptColumn that have been created that contain configuration on a per column basis. For example one of the many regexp columns regex columns reloaded, and custom-text. These scrips are all configurable in that extra custom columns can be added by editing the script config, often stored in the script file.
Adding a new type of ScriptColumn that supported assigning configuration values would make these easier to create in a flexible way and easier to use. The column could be configured via customised Script Dialogs.
For example the user selects the newest file column. They display the columns script dialog, where they select recursive and some other setting, like a filter and how to output the results.
Or I might add two regexp columns and similarly configure them as needed. Displaying columns script dialog and entering the regexp and other settings.