I only had the chance to see the first half and I didn't "key in" on aspect in particular. But, I did see Relf go through at least a 2-3 receiver progression before deciding to hit his safety valve option which was the RB leaking out from the flat. The only way I knew that is what happened is because he shuffled his stance to the direction of 2-3 receivers before ultimately turning to RB in the flat. To me, that was the single most indicative play that showed Relf's improvement as a QB. Previously I thought he was of the Money Mike persuasion of "no one's open? 17 it, I'm going DEEP!" Either that, or he would be inclined to tuck it and run if his 1st receiver was not open.
As another poster already noted, Relf rarely took the ball himself on the RB dive option play. I'd say 9 out of 10 times he handed it off instead of keeping it and we all saw how awesome he was last year when he kept it and went around the end. I think the defense new this and played accordingly which most likely significantly diminished our RB production. On some of those plays, if he would have kept it and gone around the end he would have been on his way to a 60 yard TD scamper untouched.
All in all, I was extremely pumped about Relf's performance. Russell on the other hand.....not so much. He did damn near the exact opposite of Relf. From what I saw, he eye-balled his primary receiver to the point that the other WRs might as well have not even run routes. I think he will be fine in time, but it's no question who our starting QB will be next year.
It was definitely awesome though having 2 of the tallest players on offense being our QBs... extremely refreshing.