I was swapped to a basal/ bolus regime in the early 1980s and it was very much against my will. From that day to this I have suffered with hypos during the night. As I always eat approximtely the same amount of carbohydrate at each meal, I was not looking for more flexibility. My waking BS was actually 0.1 mml higher on average over the first fortnight on four injections a day. When I went back to the hospital clinic, the doctor I had been seeing was really disappointed, but would not allow me to revert back to my previous insulin, as he said basal /bolus was modern treatment and nothing else could offer the same control. My waking BS levels continued to say otherwise.
If you are happy with your current insulin, I would fight to stay on it. Unfortunately, there are 'fashions' in insulin, like everything else. What suits one person may not be right for the next. The world and his wife have tried to solve my overnight hypo problem. My sister died owing to an overnight hypo. Personally, I wish I had never been put on a basal /bolus. I sleep with Glucotabs under my pillow every night.
Ps. I was diagnosed in August 1964.