The only thing in that list that reduces the quality of living is removing green space requirements. Having a multi-family building in your neighborhood doesn't affect your single-family home.

Reducing parking requirements _may_ reduce quality of living, if public transportation isn't an option.

Japan solves the parking problem by requiring you to have an off-street parking space to own a car. Removing street parking increases the amount of land available for use, makes the city more walkable (and bikeable) and reduces car ownership.

Many of these are increases in quality of living. There's really only a single thing on that list that is lowering