Oh God. Just... wtf. Apple really is trying to get out of anything that's not iOS?! macOS Server is the equivalent of MS's Small Business Server package, and now they're, essentially, removing core features out of it.
I think the Update Cache and the MDM will still be there. Other than that I can't think of anything (major) that's not on that list. :(
Of course, both of those things are pretty big components of iOS management. Which reinforces the idea that Apple doesn't really care about anything except iPhones.