On the Jetta (now Golf) sportwagen; yes, that one's also a good size but I prefer a higher ride height on my trip cars (like your Subie); even though you can't see over bigger SUV's, you can anticipate many more traffic slow downs, etc. in many cases so you can reroute and/or start slowing down versus sedans, etc.; the A3 sportback is just very slightly raised but smaller than the Golf wagon so loses points for utility as well as more points for a pretty low battery range despite its premium price.
My Forester's right on the borderline of tall wagon/short CUV (later ones are definitely CUV), but I really don't care about the eye height, as I'm usually driving on fairly empty roads and can see around the limited traffic with no problems. Nor do I need the extra ground clearance, as I'm rarely driving on unplowed roads, and Subies aren't jeep-road cars (lacking locking hubs and usually, a low-range). After eliminating about a dozen others, the final downselect was between the Forester, the regular Legacy wagon and the Outback wagon, essentially a jacked-up Legacy with plastic cladding on the sides. Any of the three would have suited me as they shared the same powertrain and were in the same ballpark pricewise, but the Forester won out because it was the shortest (good for turning around on 1-car wide dirt roads with no turnouts), because it was the lightest of the three by a couple of hundred lb. (the others had a 1 gallon larger tank and 1 mpg HWY more, but I figured for all the driving I do from sea level up to 7-10k feet, the weight was more important), and because it came with a full-size spare; the others had compacts, and I'm not sure that a full-size tire would fit in their spare wells. As I'm often on dirt roads or way off the main routes, I consider a full-size spare mandatory on trips.
That being said, if I'd been able to wait six months I probably would have gotten an AWD Honda Element, although its 24 mpg HWY fell just below my minimum desired hwy mpg of 25. I wasn't all that thrilled by the suicide doors that force you to open the fronts to open the backs (and forced the front seat pax to unbuckle to let a rear seat pax out, until they changed that in 2007), but the individual easily removable or flip-up-to-the-side rear seats and the waterproof utility rear floor covering were ideal. They'd just been introduced and neither AWDs or manual transmissions were available yet, so I went with the Forester, and it's met my needs quite well.
Audi showed its Q7 e-tron at the recent Tokyo car show and this site lists a 35 mile EV range (of course EU cycle once again) and its BIG (I don't need or want a 3rd row of seats; Volvo also went big with its XC90 PHEV) but we'll see once this car gets tested as well; carrying around extra pounds but offsetting it by using the electric capability may be worth it if we could travel 'gas free' on work commutes; having more cargo space wouldn't hurt either, just would be really rare to ever need extra seating more than 5.
The Q7's way beyond my size needs even if I were willing and able to afford it, but it's good competition for the XC90 and X5.
Just to get back on-topic, here's another A3 e-tron review, via GCC:
http://www.greencarcongress.com/2015/11 ... 03-a3.html
First drive: US spec Audi A3 Sportback e-tron plug-in hybrid; 83-86 MPGe with 16-17 mile EV range