I, too use a pump because of hypos, rather than HbA1c. In fact mine has gone up considerably - because it was the result of loads of highs and loads and loads of lows.... it is a very rough guide to control as it is only an average, and can be misleading.
I need no basal at all from midnight to 4 and from 2-3 in the afternoon.
i spent years on way too much insulin, almost unable to do anything. When I was diagnosed there was 20, 40 and 80 strength insulin as well as 100. I went from about 5 u on 20 strength twice a day to having to use a tiny, tiny dose in a half ml syringe on 100u. It was a disaster.
MDI basal never worked for me, because it couldn't copy what i needed, or to be more accurate, what I didn't need.
I was given one of the experimental pumps in 1981, but my dumbass Consultant didn't understand the principle and kept me on Ultratard, which meant I was fighting hypos all the time, culminating in a 3 day one where I couldn't actually get back up. I was take off of it after that and given one of the new Novopens - one of the first to have one.
MDI cannot stop you dying from 'diabetic dead in bed syndrome' from a hypo in the middle of the night.