I observe that many players become frustrated when getting to lvl 50, they would love to go on, but the game kind of stops there. You loose a big turnover by not making more levels or something to make life more interesting for people at lvl 50. We need more, besided more levels, there should maybe be some addition to the island giving some more space, at least some more licenses. Science is great, that makes it better, but when you are lvl 50, used up all the licenses, the reward for doing science only to see your storage grow even more, is not enough.
Also, the speed at which new adventures are introduced is very low, during my time here only low level very easy and quite boring adventures have been added.
Why not make something like RB, but even bigger and with loot according to cost and time involved?