That's really not a redesign. It's a bit of a facelift. It's 85% the same bike. Rest assured, when they decide to do a ground-up redesign, the underseat exhaust will probably not survive.
Here's the thing, Triumph is basically damned if they do and damned if they don't. I think everyone is a bit disappointed in the lines of the new bike, but the exhaust was the right call.
Underseat exhausts, except for maybe TonyNYC's point, really don't make much sense at all. They're generally heavy, place weight up too high, and are inefficient for making power. They can also be uncomfortable, although the 675's is far from the worst.
The chunky subframe also saves weight and in the right area, too.
Now, had Triumph turned out the most beautiful bike in the world that couldn't win a magazine comparison test, the spec-sheet jockeys would be moaning to high heaven. And so would some of you.
Are projector lights or lack thereof really going to make or break a motorcycle purchase decision? (Especially, as someone noted, when the projectors suck.) I get that all the little things add up and looks count, especially since all these bikes are already way better than almost all of us can ride them, but Triumph still has to compete--in the magazines, websites, racetracks (and, maybe more importantly, in race paddocks) and ultimately the sales floor.
I wanted the Daytona to be prettier, too. But take a look at some of the videos on YouTube from the Milan show. They seem to give a little better impression of what the bike will look like in the flesh. I think you'll find that, while maybe not as distinctive and pretty as the original, it's probably better looking than you think. And some of the details are really well done.
I'm keeping my '07 but if the '13 is as good as some are predicting, I could see myself with one of those, too. I'll see it in person in January and decide if it's too ugly to have a ball on.