Re long term maintenance on a plan like JUDDD ...
I mentioned on my diary thread that I've noticed most 'naturally' slim people I know seem to eat this way without even realising it. They have days when they definitely eat more and then seem to just eat less for a day or so. It's not a conscious decision - they just 'do it'.
My 11 year old daughter is like this ... she's slim like her dad (and all his family) and we never talk 'diet' to her although she knows I'm trying to get healthy by losing weight. (Of course, I really just want to look nice in a pair of size 12/14 jeans but I don't tell her that!

)
Sophie eats like a horse for days: I sometimes wonder where she puts all that food in her little body then suddenly, she'll have days when she eats like a sparrow. I've never forced the issue - she's fit and healthy so I don't make her finish her meals etc: she eats what she wants and no more.
I believe this is the natural way for humans to eat ... I don't think we were designed to have the same number of allotted calories every day: after all, we don't USE the same number of calories every day. We may live in the 21st century, but biologically, our bodies haven't changed all that much since the Bronze age - and we certainly didn't 'allot our calorie intakes to match our BMRs' back then!
So I'd say that eating JUDDD style - but raising the cals on a DD - would be an ideal way of maintaining. I intend to try it anyway.