Spoilers can be ugly I agree. Though I wouldn't go as far to say that the A2's is (but that's a matter of opinion)
But when designed properly they can actually help the aerodynamics. By keeping the air passing over the car laminar, rather than turbulent you can reduce the coefficient of drag. Wiper blades and other obstructive parts disrupt this laminar flow. Having said all of that the difference between spoiler and wiper blades is small when compared to the amount of drag tyres give. So if you want to reduce drag fit some really skinny tyres on the A2......I think they did something similar for the 1.2 TDi A2.
2004 1.4 TDi (90) SE, Cobalt Blue, Climate control, Cruise control, DIS, Sport seats, Winter pack, Symphony II.