I'd rock it. As for the Boxer engine in a RWD platform, it'll offer much better weight distribution and a lower CG. By using a boxer configuration, you can have a 4cyl engine roughly the same length as a 2 cyl. So they can sit the weight over the front axle or even behind it and still have a longitudinal arrangement, short wheelbase and small overhangs.
And since Subaru has already invested the development cash, Toyota gets it for a fraction of the cost.
All of the pictures you've sen have been artists' concepts. There's no hard information on what it will look like. But I would suspect a shortened Impreza with Toyota cladding. Though if it does hit US shores as a Scion, it should be more entertaining to look at than a toyota (or present-day Subarus.. )
Other scuttlebutt:
Subaru may have an STI version. If they do, Toyota may rebadge it as a Supra.