"Although I agree with you that it can easily be done;"
I feel the bolded word is an important ommission from your original statement which otherwise suggests it's some sort of fiddly work around to use Server 2012 without Windows 8.
"where does that leave Microsoft's core feature wrt 2012; the by default desktop-less installation? Worse; where does that leave remote administration?"
I'm really starting to wonder if you've actually used this or looked at it. Firstly, GUI-less operation is not MS's "core feature", it's one of many very nice enhancements and new features on Server 2012. If you don't use it (and this is the personal 'you' there, most people will be able to use it fine because they don't have your dislike), then there are still plenty of other features that make it well worth having. And you can turn the GUI on or off as you like. During run-time. I don't think you understand the advantage of the GUI-less setting - it reduces overhead and footprint when you're running ranks of virtualized instances. I honestly find your objection to using the management tools on Windows 8 arbitrary and ill-supported anyway. It's a $40 upgrade and Win8 does everything that Win7 does. Your inability to manage a different Start Screen is well-documented on these forums, yet it still comes up against my direct experience that I personally am able to manage with it fine so I don't see why you have trouble with it.
I also don't see why you find it so unreasonable that the new admin tools should be released for Windows 8 first.