I never understood all the radiation bonus perks, there's hardly anywhere in the Mojave that's radiated and rad-away isn't exactly in short supply. Only time I could see it coming in handy is on hardcore when you're really irradiated since it takes a while to go down. Otherwise it's not worth the stat deduction.
Only perk that I think is any good in this DLC is the "Them's good eatin" perk, black blood sausages heal a ridiculous amount of health. I might consider taking "Atomic!" if you got a perk every level but as of now perks are too valuable. The nighstalker one is useless outside the Big Empty since nighstalkers are rare in the Mojave. And the turbo injecting one seems pretty useless, it's very rare that I'll get in a situation where I want to use turbo and even if I did I'd just inject turbo myself with my seemingly endless supply of weightless drugs.
Edit: The traits on the other hand look pretty good, maybe it's time to make a "hot blooded" unarmed "hoarder" character.
Edit: They broke the level 30 cap one though. The only reason I'd want to cap at 30 is to make it harder and focus more on roleplaying, being able to take as many drugs as you want without getting addicted kind of defeats the purpose of this seeing as I could wander around with all my SPECIAL stats at 10 for almost the entire game.