Wow. City folk have a lot of time on their hands... (to quote my dad, with his country property: "Is it green? Is it mowed? Then it's lawn.)
This is why I would never, ever buy property with a HOA. If I wanted someone to tell me what to put on my lawn, I'd be renting.
(And this is from someone who tends to swing pretty far left on the political scale, even considering Canadian politics.)
Seriously, in terms of advice, you'd have better luck with vague language about lawn length instead of specifics of what's in the lawn, and insisting that the language be left open so that if someone wanted to plant, say, creeping thyme in the front yard instead of grass, that they'd be able to. (A friend of mine did that in the city, since he had such a tiny front plot that he didn't want to buy a mower to mow a 10x6 plot of grass... it was gorgeous. Lush, and it flowered in 3 different colors, and it smelled nice, and it survived on less water than the neighbors lawns... I love solutions that are practical, save money, and much prettier than the standard alternative.)