amen!

Could you at least then see if you can find a way to get the Mod listings in the Workshop 'Size: ' info and/or at least the ArmA 3 Launcher Mods expanded details of this mod to reflect the Actual size needed to acquire it? A it stands, this is the first that I' reading about this ,"12 gigs" meanwhile the Steam client ArmA 3 Workshop Content Download lists it as 11.1 GB (while saying that it cannot download the content because there is Insufficient Free Disk Space Available, even with plenty extra on the drive beyond that number), while the ArmA 3 Game Launcher itself , when Subscribed without having to have gotten the download lists the mod's size as a mere: 682.2 MB! So clearly there are going to be Subscribers who don't realize that the mod is probably larger still than the official file size for the game it was itself built on.

Would we have permission to create a separate pack just for the small arms, crediting all of the original creators of course?

No such permission will be granted.

Unsung Redux has now been created as an official Lite version to go with SOG Prairie Fire DLC. Never say never eh.
We decided this was the best way to work wit hthe DLC, to have a smaller pack that didnt duplicate content, and used a lot of DLC assets like sounds and functions.