I have read that studies seem to show that the likelihood of suffering complications does not change noticeably with super-tight control as opposed to control that leaves the a1c at slightly under 7. That's the magic number to try for, and an a1c of 5.5 doesn't protect much more than that according to what the latest tests I have read about seem to indicate. So there is no proof that the super low numbers help.
Furthermore, likelihood of severe hypoglycemia that can kill increases when the medium range lowers. Type 2 people can achieve this kind of a1c without risk of severe hypoglycemia since their own bodies are functioning to help regulate the insulin levels, but we can't turn off that insulin as easily. Even with a pump, once the insulin has caused a hypo episode, turning off the pump won't fix us all that quickly and we can get in real trouble with a hypo episode. I have read that instances of severe hypoglycemia have increased a lot since tight control became achievable. Did you know that once a person dies, a blood sugar reading cannot be had to show if hypoglycemia was the culprit or not? I wonder how many type 1 folks have died because of hypos but the autopsies cannot show this as cause. A bit scary.
Especially for an active person, hypoglycemia is a danger, for our muscles continue burning carbs for long after the activity has stopped. A "couch potato" type 1 is going to have an easier time maintaining a low a1c than an active person because there is little change in the body's carb requirements. But the couch potato is going to not be in as good physical condition and this will eventually cause health issues as the person ages. So you are trading the 5.5 a1c for a healthy lifestyle. Methinks you are probably better off this way.
As for a regular schedule, I would like to point out that non-diabetics don't have regular schedules either. Their bodies just correct all day long to keep the levels in the healthy range. But our bodies cannot adjust themselves, so the only hope we have is to increase carbs or increase insulin when we see test results that indicate that we need to change something. Since our bodies don't correct themselves, I feel that good control is testing often and correcting often. This is what I do, and I don't worry about whether the number is perfect or not -- it is merely a number that tells me how to correct things for the next few hours. I test and adjust every 2-3 hours and this brings my levels often into the normal range for optimum health. Try seeing the number as neutral information that tells you whether you need to change anything for the next couple of hours rather than as a goal. It eases the frustration, and the result of living this way is that my own a1c stays stable at an almost normal level -- but my levels swing just like other type 1 people's levels do. I just correct them often. The frequent adjustments are the key, not the perfect glucose tests. I need to test when my levels are NOT perfect, not when they are, if you see what I mean.
This helps my attitude a lot so I don't see it as a struggle -- it is just a constant adjustment to help me live a normal life since my own pancreas cannot adjust for me. Testing often and adjusting often helps prevent severe lows, too, for we catch the swings before they get serious this way. Your CGM will do this for you, which will be wonderful. But you still need to adjust when you see the numbers swinging. But don't be frustrated. It sounds as if you are doing everything right. We heap unnecessary guilt upon ourselves when we pin our success or failure on perfect glucometer numbers. Those numbers are just information, not a goal. Tell yourself this over and over until you believe it and the change in attitude will be tremendous.