Okay. Yes. Brand-new players to the game, who somehow know what hard-modes are, who don't want to do the solo/normal content before hard-modes, and who are able to find a hard-mode PUG that would have taken a complete newbie in leveling greens "if only s/he had AA" ... those people are going to have to slum it. As in, do what everyone else in the game before them did (or reroll). Is there a single person who falls in that category, though?
(That's the real irony about the veterans complaining that there is nothing in this for them. The vast majority of people leveling up and thus who will benefit from this change
are veterans, whose alts now won't have to jump through all the same early, pre-AA hoops again.)
No, the one set of people that is actually at a disadvantage if retroactive AA doesn't happen are the pure PVPers. If you just leveled to 80 and wanted to start PVPing without AA ... yow. Now even people who level up after you are going to have more AA than you. Either reroll or invest in a lot of lube.
At least Unchained minis will help level the playing field.