My situation is like this:
I have lots of characters and they don't share the same export scale. e.g. 50%, 75%, 100% While "Pack Setting" page allow me to set different export scale, It is not good enough for the work flow. It takes more time to generate all scales and I only need one. Every time I exported, I have to manually go to the folder and delete those I don't need. Otherwise Unity will detect and process those new files which will further slow things down.
Ideal case:
I set a scale to a project instead of to the application. Each project export with their own scale setting.
So that I can just press and export button to update file to the game without further delete file action.
What I am asking is something like adding a check box "Override/Custom Pack Setting" to save the pack settings to current project instead of sharing between projects.