Good for you, but such a diet appeals to some people only.
I'm not going to preach about catabolism and the like I'll just give my personal example.
As a 16 stone 6ft 2f fairly active person on a lean bulk I need around 3500-4000 calories a day. If you think it is possible and ok to eat that in one go every day, then you are very wrong.
This fasting might work for someone looking to lose weight who does not care about loosing a bit of muscle as well. If you're a 10 stone chap that wants to lose the flab around his waist I suppose it's possible to eat your 1500 calories in one meal, although not advisable imho. But for the heavier individuals or just someone who wants to gain muscle I'm sorry but such a diet is absolute crap.
There is an optimum amount of protein which the body can synthesize, I am pretty confident when saying that my body won't do a perfect job with 200grams in one go.