For crafter alt
There's already trait for crafter alts - Skilled, it's another one. They need to add skill "Alting" and perks for alts that allows you to do non-combat stuff better.
Nightperson was good, because:
1) It's like small frame for PE, if you'll log out each time it's in-game day and play only at in-game night.
2) You can get base 10 PE, take Nightperson, cigs and psycho, and you'll have 10 PE under psycho at night.
3) You can get 3rd doc profession with 6 INT at in-game night taking mentats.
4) With day/night vision/tohit changes implemention this trait could work even better. Also if time will be slowed down from x20 to something like x10, it would be again more useful.
Bad sides:
1) It takes a trait slot, so you can't take some more imba trait like Good Natured, Small Frame or One Hander if you're going to use pistols/rippers/powerfists/grenades/throwing knives.
Loner's good sides:
1) It gives you... +10% XP. So you need to get 248400 XP instead of 276000 to reach level cap. Or alts that needed only 3rd-6th level for crafting purposes will need to kill on 4-10 critters less. It's basically a useless good side.
2) You don't need to bother checking party list each time you're leaving public place because of sneak followers or other bad persons. Another useless good side.
3) If "People can't follow you" means you can't be party leader, then this trait has only +10% XP bonus and penalty can be avoided, and this crafting alt can be used for yet another tent for your character or character of your friends by using alt as follower and then tagging him on encounter location giving hides, so everyone will see that tent.
Bad sides:
1) If "People can't follow you" means you can't be in a party at all, you'll need a radio to create yet another tent with them.
2) If "People can't follow you" means you can't be tagged at all, then this alt won't be used for tents that are needed near all towns, and people will need to create more alts for it, or just forget about Loner trait.
They needed to replace it with Bruiser, if they still didn't make anything with it.