Raw always does big specials. It's not even really a "Raw", it's a tri branded supershow. I mean, by this logic, the Draft itself disrespects the Draft. There's usually like 3 or 4 of these a year, and it's nothing to get worried over, as the week after, they'll just go back to the way it should be.
As for Edge, it was clearly a one time deal. Vickie is legitimately leaving, and they needed to have something happen other than her just say it and move on. That's no way to part ways with the WWE, of course. Edge coming out was hilarious and, for all those that hate Vickie (as you should, she really is a damn good heel), a great moment. He won't be back, I'm sure.
So, this was a one night thing, just like last year when Edge showed up to drop the title to Punk. This is nothing like the blatant erasing of draft lines that occurred from the beginning of Mania build up until Backlash. I doubt we're going to see any kind of return to that until the WWE gets in trouble again, and needs to move people around for the sake of improving the show.