Ok - *rant mode on* The developer is just that - a property developer. They have provided more amenities for the residents here than you will find anywhere else, yet some people always seem to think that if they decide they want something more, "the developer" should build it or make it or install it or change it or whatever for them. I'm sometimes amazed that the Morse family doesn't just say that they've done all they are going to do and to stop the constant whining about what YOU want. *rant mode off*
The developer has no control regarding where the USPS decides to put or not put another post office; if you want one more convenient to where you live, petition the USPS. But - don't complain later when there's more traffic coming down your street to get there.
Here comes an opinion - I like the gates. No, they don't stop anyone from getting in, but they at least slow people down and (again, IMHO) offer some deterrant to those who might otherwise drive in the neighorhoods with malice aforethought.
Okay - I felt compelled to comment. I can usually recognize (and appreciate) sarcasm; I've even been known to use it myself on occasion!