I wish the game would focus on being for medcore players more.

[Exinias]

They're trying. But they do the same error you're doing. Midcore is not a difficulty lvl. It's giving enough activities with that will procure a mild challenge, some dedication to complete while not bringing too much frustration. Difficulty can be one of the way to do that, but it can't be the only thing.

As long as the dev (and a good part of the playerbase) continue to make this confusion, it's dead.

Hard disagree. Occult Crescent CE's would be midcore difficulty. Time spent playing the game is not Light-core, mid-core and hard-core and should never be viewed as such.