The main thing that happened for me was a fast 19-20 kilos weight loss, eating around 20-25g carbs (and no fruit!) a day based on an Atkins style induction diet for a short time. I also saw some further reduction in my HbA1c down to 40 over the next three months though not as much as my original drop from 60/61 at diagnosi to 47 in the first three months after I simply cut right down on all obviously high carb foods. I wasn't aware of the benefits of actually testing, so didn't have a meter at that time.
I've continued with a very low carb/ketogenic diet of roughly between 20 and 50g carbs a day including low carb fruit - mainly seasonal and berries, and I've always eaten normal/full fat food, but increased to balance the reduction in carbs since starting LCHF. This has kept my glucose levels pretty stable at the low end of pre-diabetes/just about normal for nearly seven years now, except for a few non-diet related slightly higher figures due to occasional illness, pain, stress, or certain medications (statins, cortico-steroids). Which I consider quite acceptable for a pancreas that's served me well for over three quarters of a century...
As far as I'm concerned I don't worry over going much lower glucose wise: I eat a healthy, varied, and enjoyable diet, I no longer take metformin, and have also been able to stop some other (non-diabetic) medications, no longer suffer from several years of dreadful brain fog pre diagnosis, life-long chronic migraines, or much less debilitating hay fever. And certainly for me these health benefits far outweigh aiming for super low glucose levels.