The real problem is that your suggestions have to go through the balancing team first, and those guys are lazy.
Raging about it here doesn't help; if you want something to be added you should be contacting them (either by PM or IRC).
Of course they might dislike your suggestion and reject it, but it's worth a try. They might give you constructive criticism too!
Let it be known that currently the four members of the item balancing team are
Fasader,
Urist,
Shik and
okiN.
Like always, your best bet is contacting the guy in charge. Fasader is reportedly the "king of item balance", so talk to him first...