Since diagnosis 6 years ago I’ve made absolutely no* changes to my diet at all – I tend to eat the usual mix of high carb / low carb food and just bolus accordingly. Works for me and, in any event, I could never ever ever stick to any sort of lower carb diet – I have no willpower at all.
* I do tend to avoid orange / apple juice though – I find it a real pain to get right in terms of balancing it.