I think it's eating fewer meals. I have never in my whole life felt really in control of my eating until I cut out carbs almost entirely (down to 2g/day). Then I discovered IF and now that I eat only once a day, I can tolerate a lot more carbs (up to around 35). I have never felt less hungry than during this period of only eating once/day. I don't even begin to think about eating until after 4 pm anymore, even though I haven't eaten since 6-7 pm the previous night.
I wouldn't add the artificial sweetener back, though, just in case.
I hope it keeps up for you!