Only speaking about the 560s here (since I avoid Hifiman):

I expected your points to be much more controversial than they ended up being. I generally like the 560s and think it’s a good starter headphone, but I cannot disagree with any of your observations. Generally, I think the 600 series is very much a step up from there at a still reasonable price point. The only things some people claim are better on the 560s are soundstage (which is only slightly larger) and bass response (which doesn’t actually sound better either) while the 600 series beats them in all other points.

Interesting shoutout to the old planars at the end there! I’ve recently been interested in vintage headphones a bit and you’ve just made me start browsing eBay again…