I don't see the point to this. If this was what they were doing, why bother? It doesn't actually accomplish anything. I don't think it needs to be fully redesigned architecture. You still have to log in to battle.net, it's just the custom game is hosted locally rather than on b.net
Not seeing a point to it doesn't mean blizzard won't do it as others have said its more for 'friend finding' reasons than stability or anything else.
With regards to the custom game hosted locally that IS the full redesign of the architecture aka full blown LAN.
We will not get LAN for SC2 (piracy being one of the main factors).
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