This thread, if nothing else, proves that there is a mentality out there that when someone or something gets too big, the average single customer doesn't matter. It's disappointing to see so many snarky comments, but that's to be expected.
Whether your letter get read or not, you know what? I think you've done more in terms of directly attempting to contact Apple about your concerns than any other person in this thread, maybe this forum, has done. Good on you.
Whether it gets read, whether you get a response, or whether anything at all happens in lieu of this letter, at least you tried. And you can't succeed at anything without trying.
FWIW I have heard of Tim responding (whether it was actually ton or someone else I couldn't say for sure) and sometimes customers even being sent something from Apple as a thank you for being a loyal customer. The OP has nothing to lose here except a few minutes of his time. Most of us blow more than that scrolling through the forum.