It is all in the follow through.
If they develop a long term stratagy of building the parks as the land becomes available they can set the city up to improve in the long run.
Failing to do anything now because you think small parks are insignificant is a short sighted attitude.
It is that go big or go home mentality that has kept many cities in a down ward spiral for decades. Once the problems are over whelming they no longer have the means to deal with them, even on a small scale.
Contrary to the big government spin doctors, you do not have to spend millions or billions to fix every little problem.