Add a tab for dependencies in the modpack content window. Hovering this new tag on a mod line (yes/no) will show us its dependencies.
1) We would know if it's beneficial to remove a mod that use it: if there is only one mod using a "fat lib", we can consider removing the two manualy. If several mods are sharing the same "fat lib", we can consider keeping the mod (and the lib).
2) Auto-delete the unused dependency (if all the mods requiring it have been removed).
Sorry I'm not English, and my vocabulary is poor. (but better than Google Translate lol)
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