My GP (rarely praised by me) refers to my BG as "well controlled" and although that doesn't sound as exciting as "remission" and definitely not "reversal", I think it is more accurate. Because my diabetes has gone nowhere and I suspect if I went back to eating carbs, my BG would go high again, I'd put on weight, and revert to all the other miseries that I hadn't connected to diabetes until I investigated.
However, "remission" does sound good, and offers a more positive take on the whole matter. Between consenting adults in private, as it were. Words, words.