Taysom Hill passing concepts question.

A few here have said Hill struggled with his reads or that his play last year "tells us everything we need to know." Just interested, and not saying you are wrong, but what exactly is that based off of? Outside of the Denver start (which was a weird game plan), Hill completed over 70% of his passes for over 230 yards a game and didn't throw a bunch of picks. I haven't gone back and watched those games but don't remember him struggling and thought he played pretty well in fact. What about those starts tells you he isn't, or cannot be the quarterback of the future? I get that Payton would put in place the best game plan to help him succeed, but he does that for every player. I also didn't get all the way through that Kurt Warner break down, is there tape of Hill missing wide open receivers? I know stats aren't everything but Hill's stats last season showed he was pretty efficient.
They are saying that Hill didn't/couldn't/can't read the whole field, like most NFL QBs do. That means once he drops back to pass and reveals which side of the field his read is on, the defense knows that he is only throwing to that side. They can then roll coverage that way and likely blitz him from the other side. In addition to making it easier to defend him as a passing quarterback, it also makes his running ability as a QB less effective.

I think we have to see what the playcalling and production looks like when he is at QB in the preseason to see if this has been fixed. For the benefit of the whole team, we should all hope that it has.