YDMV. "Your Diabetes May Vary". Actually, it should read YDWV (will vary).
It's a truism that tight control does not mean no complications. For most people, it means a lot fewer complications, and slower developing. That's not the same as "none", for sure. And of course it varies from person to person. Why does one person develop retinopathy where the person next to them only has a frozen shoulder? Or vice versa? And why do the SAME complications develop in two people, but years and years apart? YDWV!
Everything about this insane disease is a variable; we spend our lives chasing moving targets. For some, 6.7 would be "tight control", for others it wouldn't. Not saying it isn't for you -- I'm not a doctor -- but, YDWV once again.
Anyway, you have a crowd of us here pulling for you. But of course you know that.