Salty, maybe you could add a few benches and potted plants to break up all the grey, and make it into a quiet area? (I'm not really a builder) The park area looks really good, but I can see what you mean, if the parking spaces were gone it would look huge. I kind of like the parking spaces though, it makes the park a bit more realistic in my opinion, and matches the rest of HS (there's loads of parking spaces on the other lots).
I would definitely download it if you did put it up in the Swap Shop, and I bet a lot of other people would, it's a million times better than the concrete nightmare EA gave us