Yoyo, I feel like calorie counting is what you make of it. You can certainly count calories while doing 5:2 or an eating window or South Beach or whatever other plan. "Calorie counting" doesn't have to mean "eat fewer than X calories every day." I think there has been a push over the years toward methods that have less burdensome tracking required though -- that's why Weight Watchers uses "points." A WW "point" is really just a unit of measure of calories.
I'm finding tracking my calories much easier with MyFitnessPal mobile app than tracking used to be, because I always have my phone with me so I can enter things as I'm eating them, and it can scan barcodes and pull up the nutrition info which saves a LOT of time in data entry. Also, it can attempt to import a recipe from a website, which saves some time although it doesn't always work that well.
In any case, my calorie counting method has always been "eat X or less 6 days per week, and 1 day a week have two standard meals and one meal of whatever the heck I want and don't worry about the calories." Over time I have had to adjust the value of X based on my changing metabolism but it's generally worked for me. The on/off lose/maintain cycle has also been effective for me to kind of give my body and mind a break from losing every so often with a week or two of maintaining.
Anyway, I'm just rambling at this point.

The idea of only one meal a couple days a week is interesting to me, but this morning I felt like I was going to pass out in the shower because I was so hungry for breakfast, so I don't think I could make it work.
