OMG what more do people want?? I haven't yet come across a "diet" that didn't offer some sort of deprivation... and I've come across a few in my time! What I hadn't come across (until I met primal) was a diet that actually allowed me to EAT a reasonable quantity of food and left me satisfied.
Yup, there's stuff you can't eat... but there's stuff you can't eat on EVERY DIET unless you're on one of those "you can eat whatever you like as long as you keep your portions really small" which I find next to impossible... to me it's easier to go without something, than to have a really really tiny amount and are then left wanting more!
You can't have it all ways! (Well maybe you can, if you're one of those naturally slim people who can eat whatever they hell they want without putting on weight... hmm at least in terms of weight, if you don't care about health and all that other stuff).
Obviously though, primal/paleo isn't for everyone. To me, the sacrifice is more than worth it, as I've been able to lose some weight quite easily (never before possible). No, it's not falling off... and yes, I have cheated occasionally, but ultimately I can't see any reason NOT to eat this way. Obviously eating real food is just common sense... and if it makes you healthier, then why not? I don't know why you'd go back after seeing several positive improvements (clearer skin, flatter belly, less digestive issues, some weight loss)... but each to their own.