As far as the OP's issues are concerned, I'm so sorry you got sick on your honeymoon. That is really unfortunate. It sounds like your trip was also a trial run of
DVC and that you were disappointed there too. I've never stayed at BCV, but recently stayed at BWV and found it to be clean and well maintained. I was very impressed when we returned at 10:30pm one evening and found someone hard at work, cleaning up a spill on the hallway carpeting!
As far as your room not being clean when you arrived and not getting T&T on day four, I hope that next time you will just pick up the phone and call housekeeping. It's not fun having to deal with housekeeping issues when you were hoping for the perfect vacation, but if you just make a phone call and get a problem addressed ASAP, you can get on and enjoy your vacation.
It sounds like there may be some issues at BCV and writing a letter may help bring management's attention to these problems. But your letter reads more like whining and venting rather than a factual report of the issues you experienced. I suggest that you rewrite it so that it's concise and focused on the maintenance and housekeeping issues you experienced.
The section about getting the flu should be removed unless your real goal is to try to get a refund of your unused dining credits. If that is your goal, then again be concise and direct and just state that you spent half of your stay in bed with the flu and would like to know if you could get a refund of your unused dining credits. I doubt you'll get a refund but who knows. However, including this section weakens the rest of your letter since it changes the tone of your letter from "I was so disappointed in the condition of BCV that I am losing interest in joining DVC" to "I got sick so give me my money back".