I would disagree. He made several reads and throws that allowed the WRs to make a play. Hoffman missed about 5 catches on the night, one of them for a large gain. There was a PI on that play too, but he still should have caught it for about a 40 yard gain. It was right in his ribcage.
It was the qb change.
The Oline was better at run blocking, but I watched them from the stands all night, and they were getting fooled with simple twists from the Dline, and getting pressure all night long. T Hill was actually that good at picking up the reads and dumping off, and knowing where the blitz was coming from pre-snap (something Riley is virtually oblivious to).
Everyone points to the play that was a quick out to a WR, and the defensive back jumped on the play, and if T Hill would have thrown it the ball would have been intercepted. T Hill recognized this and tucked the ball down for a 6 yard gain or so. Riley would have thrown that (if the intended target was Hoffman), and it would have gotten intercepted, probably for a pick 6.
I think at this point, a healthy Riley - if that even exists anymore - is still not as good as T Hill. A healthy Riley might have more poise to make some of these touch throws, but Hill still has a much better arm, and better vision (not to exclude far superior athleticism).
T HIll should be the qb going forward. Why not use Riley at fullback? Pritchard isn't doing jack squat. And if Riley wants to play special teams and fullback to "just get out on the field" then let him. But not at qb anymore. He just isn't a good option anymore (see what I did there?).