The thing that I do find most intriguing is the concept of the kinda-sorta PvEish version of BGs. Imagine the PvPish zones in Grizzly Hills, and instead of a loosely connected set of dailies, convert them into an "event", and that's what you'll get in this new PvP hybrid.
In practice, I'm not sure how well this will work, and whether phasing will do the job as needed. Think of Tol Barad, and how that has dropped off like a rock.
I was thinking about this, and how the smarter thing that Blizz could do would be to create a PvP option where --if selected-- you'd buff up the non-Boss NPCs in Alterac Valley and add NPCs as needed in the other moderate to large BGs. That way the NPCs wouldn't be a pushover, and you could theoretically turn AV back into the epic battle of old.