The leaner you get, the more important macro counting becomes, and since your goal is to look better than the average, I would track it. It makes progress easier and, well, “trackable” so adjustments can be made.
Even people who are just trying to lose fat tend to just count net carbs, way overshoot their caloric allotment on ULC days, and wonder why they’re not losing anything. Not everybody, but it seems like a common problem.

That depends on how strict you want to be. Unless you’re planning on using CNS for a competition, it’s probably fine to just eat the things you want without being too anal about it (given that you don’t gorge yourself silly with ridiculous amount of food). I personally think it’s more important to ensure you’re in a deficit during the ULC portion of the week. In most cases, your weekly caloric intake will most likely still be under maintenance.

It’s a once-a-week indulgence, you might as well enjoy it guilt free 😉