"He is going to show he has a lot more arm strength than many had thought."
Seems to me that this DID NOT happen.
You can argue the relative importance of arm strength, but that was not your original contention.
We knew he was accurate, his arm is nothing special. Only "surprise" I gather is that he is faster than we thought.
I hope some team is stupid enough to draft him early as you contend, but I do not see any basis to change ones opinion based on his pro day.