#1 thing is they have to be able to catch and run, juke the first tackler and get some yardage on short throws. That is the most important over anything else. If they can block and run over guys, that is a plus. DJ is very good, all around RB for us. I like Woody's shiftiness and cut ability, but he isn't durable. If you recruit a bunch of "Woody" types, it will always be RB by committee due to the shots they take.
Off topic a bit, I love the delayed shuttle pass. Will does a good job on selling the downfield throw before pitching it to the RB. We kept burning Arky (and A&M) with this play.