Im not sure if "revisionism" is the right word. There were plenty of debates at the time about his worth, his consistency and his decision making, they went on right the way through his time here. I remember because I got caught out once or twice making remarks that were deemed inflammatory and got jumped on by his fans.
I would say that even during that 1.5-2 years that people talk about, he was never seen as one of the best wingers in the league by anyone other than United fans. I think that is because, while he had it in him to be excellent, he wasnt amazingly consistent in that period. There was a thread about it at the time, about whether Nani was the best winger in the league, that he was was never a consensus opinion, even if it was a majority opinion on here.
That was the debate tho. Is he the best winger in the country (at a time when Bale was doing well but not, for me, getting due recognition on here, for what I felt at the time were partisan reasons). He was clearly very good, and a damn sight better than most of our options at the moment.