You can vary your calories or carbs or whatever you're counting without "eating bad", don't get me wrong I'm certainly not against the treat meal or day. I know from my own experience the treating can get away from you, but also is very helpful to have something to look forward to.
I probably sound wishy-washy but just wanted to put out there that it is possible to keep your body guessing on the amount of food it's going to get while still staying in a healthy range.
There's probably still a thread on the WW forum about the Wendie plan, which was about varying your points. I have always heard that it is not good to eat the same thing every day for many reasons.
Best to all
Edited to add: don't forget, everybody's different, find what works for you, and don't quit!