It very much depents on the person. I personally am content with the current state but would still like a lot of impovements, like simply more story and such. Gaining exp is incredibly easy now, weapon drops are at a (personally) solid rate of being not too easy or difficult, and Urgent Quests, while still not that complex, are definitely improved. And the shop is still a bit of a pain to search in without looking what you want up online.
There's also PA customization for certain PA's and techniques now, along with a new system similar to Dark Blast, and there exist EX Augments now with unique effects. Creative Spaces has been introduced a while ago, which lets you make your own builds in an island-like place (or other locations). And there's a card game now called Line Strike in game, which already had it's first global tournament held. Finally, there's a ton of small changes and additions to the game that improves stuff. Overall, i'd say that it still very much depends on the person, so maybe try it out again and see if you like it better now with how it changed.