The problem with those parts of the parklands are they are disconnected from the city, they aren't easily accessible. I like the concept of the parklands, but it'd work much better as winding through the city so all parts are accessible. Since this a wish list without having to stump up the cash I'd do swaps. Pick a couple of streets, something like Franklin or Carrington, rip up the buildings and put in parklands that are usable. And have an equal amount of parklands opened up for development so there's not a ring around the city. A few more squares or park areas in the city, traded for the useless bits of the parklands and you end up with a green city centre that can get use 7 days a week.