The problem with midcore content is the lack of rewards. Just look at criterion dungeons. I really like them, but I have no reason to spend time running them as the rewards are not worth it. They have their gear progression pretty locked in and they are clearly intent on never disrupting it. Not necessarily a bad thing in general, but I would like secondary options to exist so I can gear my alts to at least be reasonably close to my mains gear. Hopefully with the criterion dungeons they can in the future figure out a mid tier progression that doesn't interfere with crafting and savage sets.