Midcore player here. My kind of content is Extremes and the easier Savage floors. I have never seen a player call themselves midcore and ask for easier content. What people do ask for is an actual level of difficulty between Normal and Savage. I, too, was incredibly disappointed by Chaotic - not only is it a Savage fight, it became so gatekept that I gave up on it.

My issue with "challenging" fights in this game is that they rely on two methods - speed and memory tests. I don't particularly enjoy either of those. Arcady Nights Encore was a nightmare for me in prog because it's really damn fast and I have issues processing information at that kind of speed. I still fail the mech about 30% of the time if I get a cursed pattern. Having to remember what a boss stored for later is also just...lame? I would rather have the mechanics be slightly easier and the jobs more challenging, so the real skill expression would be optimizing your job for the particular fight. Unfortunately, this is the opposite of the direction this game is going. We are making jobs braindead and fights DDR.