With the coming of your next big update, who will only bring needed quality of life upgrade, I was thinking what good thing you can bring to make the game a little better.
1: Time is in essence
First and for all thing, take your time. We don't need a extension every year. One extension each year always bring some problem, like data size for exemple or the content of each extension itself. We known that your are good to make good content, each and every extension and update are in the good side of thing. But now take a minute to imagine what good content you can make in more time. I known how you work, you have two or more teams of developper who work on each extension, one team par extension. You have show it that you can make a good story and update with this method but i will said that will be the best for your team and the game to take more time. Just one more year, just one more. You have a good way to make the game so much better.
I will bring some idea for helping a little, in the beginning of the year, you make a annoncement of the extension and one month after that, you make the big reveal trailer and after that, in trhee month a update with the new twin dungeons and three month after that the big extension. After the big one you make a another twin dungeons and after three month or more the last chapter, who will complete the story. (In exception of Necrom for this time) That not bad way to make your game but with the years coming by that always seem a little simple so the tweak that a little more and making it interesting. In place of bringing two dungeon in one update, bring in one at the time but before the big trailer and annoncement of the extension. So the players will specultate for what your will talking in the next extension and that will bring the flame of passion (not of ambition thankfully) in the game and the community
2: My little dungeon
My second suggestion will be to bring a story mode for the dungeons, with that some people can litteraly play the game in there own pace and listen the story with out thinking the the other players will wait for them. For the loot, make it green.
in the same idea, make that in the menu when we select the dungeon we can see if we complete them (Story, standart and Veteran) like just a little thing who will be said yes i have completed it. Like i have already have the trophy but not the burst and i didnt complete the story of this one for some reasons.
And that all i was thinking for the quality of life. If someone have a goods ideas write it down and sorry for my writing english is my second language.