Not surprising at all, it is just not worthwhile doing from project management perspective, regardless what a bunch of people on Internet think about it.
Or Microsoft doesn't have a VPN team any more, and hence no project managers to make management decisions for them.
I'm not even kidding that much, the DirectAccess team appears to have been disbanded and all of the open issues were unofficially put in the "will not fix" bucket. I suspect the Always On VPN team is one guy, but probably not working on it full-time.
