The fact that you need determination and months of practice to clear makes it more hardcore, especially if you are a weaker player. You stating otherwise does not make it true.
That is all your own definition of what you think defines midcore content.Unreal and extreme are on the lower end of midcore, maybe the top end of casual. You can go in blind and clear in a couple of lockouts (or a couple of pulls in the case of Byakko). If you're unsure as to whether unreal and extreme are midcore, the problem here is your definition of midcore.
"Drop-in" content is casual content, not midcore content. Midcore requires some, but not a lot of, commitment. Midcore content is content that you can chip away at without having to spend much time optimising. Unreal, extreme and savage are midcore content.
I never said that I was "unsure" if this is midcore or not, I said it was debatable. Especially considering "midcore" has never been defined, and everyone has their own expectations of what constitutes this.