Yes, I think the key for some, is to 'confuse' the metabolism. I have been doing that by random and intermittent fasting. My main aim is to maintain the good BG levels. An added bonus would be to lose some excess weight. I am resigned to the fact that some of us don't seem to be able to slot into any particular theory, and so the search for a solution goes on. Some would say that having followed ND in the past I have messed up my metabolism. Perhaps if I had discovered LCHF first I could have used that method and had the sort of success I am often envious about when I read of others having done that. Can't turn the clock back, so will never know. It really is tedious at times, a d those who haven't lived it don't always understand.
I've done a great job of confusing my metabolism over the last few months, but not necessarily in a planned way. I do think that possibly my indecision may have worked wonders in that regard
Re the messed up metabolism thing, after I did a lot of reading around on that subject recently, I wouldn't sweat it. One of the more interesting studies I read compared fast to slow weight loss, and there were pros and cons.
Both speeds resulted in a slowed metabolism. The faster speed resulted in a slightly more reduced resting metabolism, but better glucose tolerance and reduced insulin resistance. Take your pick.
This forum must contain a lot of members who have undergone a fair bit of weight loss by various means, and also who keep food logs. I'd be fascinated to know if anyone feels they have gone from obese to normal weight but have anything like the kind of 'maintenance calories' predicted, e.g. 2,500 a day for men.
The way I see it, once one becomes obese, that's the problem right there. The metabolism is in trouble (doesn't matter whether you see it as that the metabolism was in trouble and that's why you became obese, or the other way around, or a bit of both).
Maybe I'm pessimistic, but all the research I've done tells me to expect to need to eat
far less than 2,500 calories a day if I ever get to a comfortable weight. I'll be quite pleased if it's 1,600 or more. So you could take the view that it's not the method of weight loss that reduces one's RMR, it's the fact that one has been obese in the past. Also, I don't see much evidence that a reduced RMR is a damaged metabolism. It's a very efficient metabolism, just one that's inconvenient for keeping weight down.