I don’t know. I came back after a nine year absence toward the end of Legion. I was really frustrated that I couldn’t fly in WoD. I nearly quit right there. Then when I made it to Legion I was always frustrated trying to earn rep because people who had flying unlocked in Legion already would fly to quest objectives, land and tap them while I was still running there like an idiot. I felt penalized almost, as those with flying already were just getting things done so much faster and easier than I was.
As a returning player, that was very off putting. During that grind I had some thoughts and ideas that could make it easier for folks catching up. Maybe after an expansion or two you reduce the requirements for flying and/or reputations for those older parts of the game. I don’t think veterans should take that too hard. After all, they have the benefit of getting to play those races day one. Even though I went back and finally unlocked WoD flying, I wouldn’t begrudge anyone if they could do it much faster than I had to at this point.