I am in the camp of being more aggressive with dosing. There are a couple of reasons for that. First of all, while I have seen many many cats on here die from ketones (too little insulin is a key factor there), I've never seen a healthy, reasonably dosed cat even get into danger from dropping a little low. I know it's possible, because anything is possible. But it hasn't happened over here in prozinc-land during my time here. I've seen a cat with a secondary health issue get into trouble on another forum, and a cat that was receiving ridiculous levels of insulin without monitoring. But a cat who is being monitored and dosed well? It's just never been a problem here. But too little insulin? that has taken many of our kitties. So personally I'm more afraid of under-dosing.
Second, the window to get a cat into remission is fairly short. A cat that is on a low carb wet diet, and is dosed well, has a 60-70% chance of remission within six months. After six months, the odds go down to about 20%, and after a year, it's a long shot. (I'm sorry I'm having trouble finding the article that cited that right now). So my tendency is to recommend careful monitoring (which you're doing) and a more aggressive stance on dosing to take advantage of the early days of a diagnosis.
I'm not talking about going crazy here. I think aiming for low blues and high greens is good - I'm not suggesting aiming for 50, and certainly not suggesting being reckless in any way. But I think what you did today, and the numbers you got, were good. Ideal really. And I think it shows that she can handle 1u at a number like that. At least for today. When a cat decides to go into remission, they usually do it fairly quickly (at the beginning), so it does require care and wisdom.
All that being said, if you feel more comfortable with 0.75u, go for it. I do believe that sometimes the caretaker has a sense about things, and if you're feeling like a reduction is needed, do it. Trust yourself. If the cycle ends up too high, you can go back up in dose tomorrow. But your mama-sense might know what your kitty needs better than anything/anyone else.