Does this mean certain weapons are more effectively handled by certain dwellers? Has anyone tried?
It makes a huge difference. If you choose a weapon/outfit that needs I (intelligence) to craft, and you have room with people maxed out on I, but all wearing say strength gear, for a high end legendary weapon, that will take over five days to craft. If you switch everybody out to +5 I Advanced Lab Coats it will cut that time down to a little under two days.
Wow, the +7 makes that big of a difference, might have to sacrifice making Bittercup and Autumn outfits, and focus on all the Heavy gear.
Six maxed dwellers in jumpsuits were 7 hours for the institute rifle - switched them all into battle armor and got 5 hours - into lab coats and it cut it down to 2 hours 6 minutes.