I think that (once again) your question is a classic example of YDMV (Your Diabetes May Vary - coined by @BadShoe, BTW).
If you are doing better in managing your diabetes on 55 - 70 grams of carb/day, AND all other health aspects are running okay on this sort of diet, then go for it!
Some will eat less - @Terry4 on 30 grams/day is incomprehensible to me, but I can’t and won’t argue with his results. Heck, I won’t even engage in vitriol!! (I might be passive aggressive though
).
Some will eat more (a lot more), I stack my carbs early in the day and work down from there, with a fairly small meal (calories, portion size and carbs) for dinner. I eat a banana first thing every morning for a hearing/balance problem, followed by a bowl of shredded wheat - something in the range of 77 - 85 carbs. Lunch is generally a sandwich and a glass of milk - 52 carbs. Dinner is in the 12 - 30 carb range, and there might be a mid-day snack or an after dinner ice cream (especially if I am trending low from activity). Why? Because YDMV - this is what works for me.
That doesn’t mean that I don’t have the occasional humongus dinner loaded with everything, but I just pay attention to the inputs and outputs. I find a LCHF dinner leaves me struggling @ 2, 3, 4, 5 A.M. with gigantic spikes. But, I don’t eliminate them, I just manage them as best as I can. I am trying to be victorious every day, part of that is to continue to enjoy eating.
My results aren’t totally flatlines, but mostly rolling hills with the every so often mountain and valley. My health outcomes are very decent with the only diabetic complications left over from before I started pumping. I feel great, have a decent A1C (generally 6.0 - 6.3), stable weight around 165 - 170 lbs, etc, etc.
I wish you the best on your journey - TuD has much to offer. Approach with an open mind and be rewarded.