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 summon a pet in Abyssea that's Lv30 just kills off all other content.
I don't know why anyone would argue that this should not happen. And what is the point in having special items for new pets like the Healing Salve 1 to keep their HP capped up untill Lv30, all so that they can be SUPREMELY Power Leveled by their masters. And when they get all the way to 90, the Lv30 capped pets will be useless anyways.
I really don't know what SE was thinking when they decided to allow Lv30 pets to enter Abyssea... Seriously, what can a Lv30 do in Abyssea, OTHER THAN be extremely power leveled??? So what if there is some minor Blood Pacts/Ready commands in between? It's not going to stop people from just getting one easy pet to beat Maat with (Nazuna), so that they can save all their gil and not have to worry about it anymore.
Bottom Line: Allowing Lv30 requirement to enter Abyss opens up the opportunity for pets to exploit and bypass other areas/content of the game.