I think Witherden is 100% in the West Coast team for round 1. It wouldn't surprise me though if he (or someone similar) got dropped a few weeks in to set standards.
Of course they want to get games into the kids, but competition for spots and getting them to earn it would have to be better in the long run. H Reid aside, I don't think many rookies should be guaranteed a spot from the start.
You of course know a lot more than me about WCE though!