OKC will dominate everyone once they realize that Westbrook is a Shooting Guard. Don't trade him , just get a decent average PG who can distribute. This will free up the ball and lead to wide open shots not only for KD and WB, but also for Ibaka.
I saw WB and KD in OT just taking turns shooting when Ibaka was wide open THREE TIMES underneath. A decent PG would see that and get his team easy buckets. If OKC uses Westbrook as a SG, they'll be unstoppable.