Don't forget to minimize outdoor lighting and make it the right color temp (2800k). We need to keep city light pollution in the city as much as possible and set an example of how to do outdoor lighting right.
If you never build parks, you’ll never have parks. Everywhere needs parks and there really isn’t an upper limit to the marginal utility of more park space. If you want to add housing, add it densely, vertically, and adjacent to existing parks.
The land is worth a lot, even the shabbiest office building on top of the land is still worth quite a bit, it's the demolition and remediation costs that cancel the latter out, because they are also quite a bit.
Someone still needs to buy the land and then pay out of pocket for the demolition and remediation costs.
In my city, there are quite a few office buildings started or built during the pandemic. They are "see throughs" because there are no tenants and it's probably not likely there will be anytime soon.