Took the surround off the parts 05 Legacy that I have to see what it would look like without it.
The windshield is not a smooth transition to the roof:
Here is the 12 Outback to compare against:
Next part was the windshield sides, the gap is much bigger then on the 2012.
Another pic of how big the gap would be without the surround (read: probably too big and water will pool).
Now that simply removing the surround is out of question I'm going to start hunting for a universal one that's more aerodynamic, I need to remove the existing surround to seal the windshield anyway (A pillars get wet in the rain).