Wow I forgot to mention the hoochie clothing!
Seriously though, It is true that unless some serious street level marketing research is done, there is no definitive answer on what type of stores should or shouldn't be in this neighborhood. Nor will there ever be. Though I think dssjh you already provided the answer.
I used to live in Harlem, and most people didn't have a problem with all the hair salons, chinese food joints with bullet proof glass, and bodegas with one rotten head of lettuce, if that. However it has been ten years since I lived on that block, and now there is a coffee shop, upscale deli, and fancy restaurant there. Neighborhoods change, and Jackson Heights is more dynamic than most.
Maybe this is an issue of gentrification. I don't think so. When my friend's parents grew up here it was a predominantly Jewish neighborhood. The gentleman who inspected the apartment I live in (yes I am a homeowner here, so I am vested and do believe in this neighborhood) lived in Jax Heights when it was war barracks post WWII for returning veterans.
There is no "dealing." Thats a jaded and response. This is a dynamic neighborhood, with a lot to offer to many people. The fact that there are, as you say "dozens" of emails pertaining to this topic shows me that there is a large element to this fantastic neighborhood that is not being serviced. Theres your marketing research right there. As Daniel Dromm said, there is a bit of a baby boom going on in Jackson Heights now. Young families are moving in. If there needs aren't met, then there dollar unfortunately goes elsewhere.
Some people see this. There has been real estate campaigns in both Williamsburg ("Billyburg, Meet Jax Heights") and Park Slope ("More Park, Less Slope") to try and attract people from those neighborhoods who might see a benefit to the value and beauty of Jackson Heights.
I don't think this neighborhood will ever fully lose its character for great ethnic food. For the forseeable future there will most likely be Indian, Columbian, Tibetan, Nepalese and Thai food here. Just like Astoria will always be great for greek food, and Harlem for soul food, even if the cuisine becomes more diversified. Jackson Heights will not lose, nor be hurt by further culinary diversity. These "Dozens" of strains prove that there is a market.
Change, I feel, is inevitable here. Deal with that....