My husband does graveyard shift - 4 10's a week. When he started he wasn't Primal and he's obese, has sleep apnea, you name it. Graveyard is a killer, but since going Primal last month, he's doing a LOT better. He's stopped snoring, so I'm sure he's getting better quality sleep. He's dropped nearly 20 pounds. He may not see it, but I do see better energy even on days he's wiped from work. He's eaten LC foods since that's all I prepare for years, but he'd still eat out and his particular company gives out regular soda & they do bagel and donut days each week. Since agreeing to skip those, he's been a new man. He's had a pack of those 5-hour energy drinks in his desk for several months now, iirc, and he's yet to NEED them to stay awake at work.
As for sleep during the day, he usually supplements some melatonin and uses a sleep mask and ear plugs (we have two kids, 10 and 4, so it can get very noisy in here at times). For the first time, day before yesterday I believe, he was able to sleep without the mask or the ear plugs, though why he thought to experiment w/ that, I don't know.
Before going Primal, we were both discussing how much longer he'd have to do graveyard, how taxing it is, etc, and since going Primal we haven't had that discussion. I'd still like to have him back doing days so we see him a little more, but it's not slowly killing him like it was before he changed his diet, so I think however much longer he chooses to do it, it won't be quite the hardship it started out being.
More $ a big plus, less stress from the boss, another big plus. I'd say give it a shot. Get some blackout curtains for your room, some ear plugs, sleep mask, and maybe melatonin just in case. Being Primal should make it a lot easier on you, but it might not. I'd have to say give it several months, and if you still feel like dried-up pulverized @ss every day, then it's probably not for you. Also, hubby is up in the AM's after work (he's usually home ~11am), until about 2pm, then sleeps until about 10pm before getting up - that schedule would allow you to still get in some much-needed Vit D and exercise before bed.
Good luck and let me know if there are any other questions. I'm hoping to convince hubby to put some time in here on the forums since he's Primal now, too, so eventually he could be answering these types of questions w/ his own voice. Hope you'll update on how it goes.