There just needs to be more midcore content, tbh. There isn't much to do in the middle. The content space between easy and hardest is almost nonexistent for PvE at the moment. Savage isn't midcore content; savage 1 and 2 aren't a part of their own content cluster. They're a part of Savage Omega just like 3 and 4. It's really all one entity, the rewards and progression are all tied in together. You can't finish the progression if you don't do 3 and 4. It's not midcore content, it's simply the easiest part of a hardcore raid tier. Wouldn't it sound strange if I said the starting area in a Dark Souls game is for casual players and the later area is for hardcore players, when in reality, you have to do both if you want to finish the game?