It would be very handy if one could group mods together.
For example I have ~ 15 weapon mods installed, which clutter the mod list, if one could put them into a custom group for example called "Weapons" the list would be significantly smaller and clearer organised.
Those groups should be indepenent from the actual presets. So if one creates a new preset he can click on the group "Weapons" and all weapon mods are added to this preset.
(I know BIS_wizard has to finish his cloning machine first ;) http://feedback.arma3.com/view.php?id=27294 )