I think this is a decision/mindset from Lamar and the team to hunt for big plays and not an inability to read the defense. Maybe a matter of semantics, but for a West Coast offensive attack you need to read the coverage before the snap and basically know where you're throwing the instant you get the ball. That's not a strength of Lamar. Nor is making the very precise throws that are often required for such an offense to work. If a receiver on a bubble screen has to scoop a low throw or leap for a high one, that throws off the entire timing. He is, however, very good at reading a single defenders reaction and knowing what to do (the run-option mesh point is entirely predicated on that read). I think he also does a good job of that deep in the pocket, buying time for a receiver to come open if the play breaks down.
I agree that he's remaining in the pocket and looking for a big play more frequently than in '19 when he would scramble more. I don't think that's because anything about Lamar's skills have changed, rather I think its a group decision that they'd rather hunt for big plays in the passing game than takeoff and take a lesser gain. I don't necessarily agree with that mindset, but that's what I think is happening. I don't think Lamar is trying to prove he's a passer now nor do I think he's afraid to scramble. I think that they all as a group think that this is the best approach.
I think his receivers have something to do with him being terrible on the deep ball. He's actually worse with them this year than he has been in 2019-2021. All while throwing more of them. He looked really promising on them earlier in the year, so it's kind of unfortunate that he's regressed. With Bateman out I really think they need to reduce how many he throws downfield. He's on a pace for 71, which is more than any previous year. He threw 68 in 2019 and was fairly successful on them.
Against the Saints they really shouldn't be throwing 5 deep balls out of 22 attempts, with Andrews and Bateman out.
In general I think his accuracy issues since last year on passes less than 15 or so yards is overblown. He's had some bad games with them but he's generally been much more accurate in this range than he was in 2020 and to some extent 2019. But I don't think we want to run a west coast style offense because how do you incorporate a west coast style offense with the running game we have?