This should have been what it was in the first place. And if not 75, at least 70 and no lower. It makes no sense, because being able to leech in Abyssea at Lv30 just kills off all other content, save for skilling up later once you hit 90.
I don't know why anyone would argue that this should not happen. And what is the point in having special items for new players like the Destrier Beret to keep their skills capped up untill Lv30, all so that they can be SUPREMELY Power Leveled by their friends. And when they get all the way to 90, their Lv30 skill levels will be useless anyways.
I really don't know what SE was thinking when they decided to allow Lv30 people to enter Abyssea... Seriously, what can a Lv30 do in Abyssea, OTHER THAN be extremely power leveled??? So what if there is some minor Limit Breaks in between? It's not going to stop people from just getting one easy job to beat Maat with (SAM), so that they can open up all the Genkai and not have to worry about it anymore.
Bottom Line: Allowing Lv30 requirement to enter Abyss opens up the opportunity for players to exploit and bypass other areas/content of the game.