I can not be more thrilled to have the marketplace off the home page completely. As I've said many times, the only place that foregrounds sales on the front page is the Pennysaver, and I'd like to think MR is a little more than that.
While the Marketplace aspect of the site is important, it was rapidly becoming "the site" and that IMO is very much not a good thing. A neat and tidy, easy to navigate Marketplace one click from the Homepage seems to me a vast improvement.
Regarding "Weeks Best Threads" I don't think it is fully functional right now, and if you don't like it, just keep it closed. The intent as I understand it, is to attempt to keep threads with actual content from getting buried in a matter of minutes-- which is in fact the reality.