There have been several threads lately in which someone's site suffered a loss of Google traffic, and they reacted by making big changes, either to the content or structure of the site, or by trying to get backlinks removed. In nearly all of these cases, their Google traffic fell even more.
There was even a thread a few months ago about a patent which described how Google might use quick reactionary changes after a traffic loss as a signal of SEO activity, and further demote the site as a result.
My feeling is that you should design the site the way you want it, and keep it that way, unless you see a way to improve it. Making changes that you know don't improve it, and in fact even make it worse, in an attempt to please Google, apparently often backfire anyway. If you don't make any changes, you'll still have a site that you're proud of, and as recent threads show, very likely will get just as much Google traffic, if not more, than a site that you've torn apart in an attempt to please Google.
