Abbysea is great as it is, perfect add ons. The only problem is that the old content cannot measure to the greatness that is Abbysea. The Feb update addressed this with a bandaid solution, but they can do a lot more to it to make it very comparable to Abbysea for a lower lvls under 75. The only reasons they are doing it slowly is because they want everyone to buy the 3 add-ons and make as much money as possible. If they adjust the original contents comparable to abbysea and updated the stats on the gears dropped from endgame activities outside abby, people will go back and do the older contents. Within 2 mini updates and 2 big updates, they will do just that. By then, they probably have the next mini add ons or expansion ready so that you have to buy them as well if you want to get to 99.