Great post em. I really identify with the binging when off plan thing. I did ww a few years ago and got to 8st 6. I stopped going to class but I couldn't maintain it. I ended up eating less than 1000 cals on the week days and doing loads of gym work, then when it got to the weekend I'd just go mad on eating everything. There was other stuff going on as well, but I do feel I was bordering on an eating disorder.
I'm determined not to get into that place with sw, and I do feel the eating unlimited and not calorie counting is really helping me with that. I can have big salad with loads of protein, unlimited fruit etc. Similar to you em, I lose 1lb on average a week, only been sotw once, but I'm fine with it.
My only issue is when I'm going to stop. I've decided to see how I get on, I want to make sure whatever target weight I choose is maintainable, while still having fun, but not get into this starve/binge cycle. That's why I won't set a target yet, as I don't want to be just striving for something unobtainable all the time.