You need MJD, most of the RB's you have are OK enough, Greene isn't any better than most of them. I have never been impressed with McCoy - I waited for him to explode after he took over for Westbrook last year and that never happened. You may want to consider dropping Freddie J. UNLESS he starts, but consider whoever is starting in Seattle if it is Forsett or Oakland if it is Michael Bush. I'd probably drop Freddy J anyway simply because he is in a division with tough defenses and he doesn't have much of a line to run behind.
You have enough good receivers that you don't need to worry about Austin - and Austin has enough other guys on that team to share catches with. And remember who Dallas was playing when Austin had his huge two games - basically teams with no pass defense nor pass rush.