I actually sent that mail in regards to a couple of friends of mine who live in a town with a pop of 1500. There are no Pokestops or gyms there, and the closest Pokestop is in another town, a 10 minute drive away.
In my town, with a pop of 2500, there are 4 Pokestops and 2 gyms. Not bad, but the distance between the stops is on average half a mile, so it's still a problem for us.
Let's hope that Niantics will have the ability to take everybody suggestion asap.
But that was kind of you to mail Niantics for your friends.