Don't you just love it , you order the new 6 plus and they say shipping around September 30 and people are buying in stores now. That sucks. I bought mine a month ago.
From the early feedback we're seeing from store-purchase early owners (I've noticed you on those threads too), you may have an opportunity to dodge a bullet by cancelling if you get too queasy about it.
I have a sneaking suspicion the RR6 will be a fairly short-lived product, replaced by a 6x or something, with many fixes and improvements to performance and range, unless they like to cave in to arbitrary limits on performance that competitors will take advantage of.