I stayed for the first three quarters. NO time for any QB to set up in the pocket. Jonsen showed a predilection for lofting his long throws. 
There were a bunch of slight-movement offsides on the part of the TEs and RBs that were not called.
Compared--- I know it's a gold standard--- to Mariota's springs, this was pretty bad.
Heck, even to the Jeff Lockie one it was.
LOTS of room for improvement. 
In all areas.
Scariest problem: Prukop seems to anchor his feet after a drop; his feet hardly move as he looks down his first read. He needs to learn to move his feet AND his eyes, simultaneously. 
Unless there's some amazing improvement, this season isn't going to be a step forward.