If you are having card refeed on weekend, you are carb cycling. That term could have several meanings depending on your specific plan. Days with low carbs, then day or two with high carbs. Some carb load every 3 days, a typical CKD is on weekends. If you aren't having carb ups then technically you aren't on a Cyclical Ketogenic Diet, you would just be on a keto diet. No big deal though, both have it's merit. I say keep what you are doing if you are still having good results.
If you aren't doing carb ups, then you probably are somewhat flat looking. A carb day will definitely make a difference as to filling out your muscles, because you reload your glycogen stores in the muscle.