One of my absolute favorite tracks in GT4 (in a tie for first place with Nurburgring). I wish it had more votes in the feedback section. It's perfectly suited to my favorite type of car (small, light, underpowered; think Alpine 1600s, Lotus Europa), and is also an insane blast in something powerful but nimble (Yellowbird, etc.).
Not only did we lose this great track, we lost all tracks best suited to this type of car. There isn't anything in GT5 which is comparable. (I miss all the tracks from GT4 very much. Frankly, the only tracks I still really like in GT5 are Nurburgring and Sarthe. I've always disliked "purpose built" tracks. I like all the tracks that were formed organically the way the roads and terrain dictated they had to be. There is something so raw and exciting about those tracks that just doesn't come through to me in any of the purpose-built tracks like Fuji, Suzuka, Cape Ring etc.)
I put in my 3 votes for Citta Di Aria ages ago. I hope to see a few more people vote for it and get it moved up the list a bit. It would be great to have a track properly suited to some great low-power racing.