It's my understanding that the Elite 11 camps are for HS QBs. So, I was under the impression that this was a video of work he did as he was ending his HS career. We don't know what he did during his year or so while he was at Houston. I would assume he's been working on issues with his mechanics throughout his time there.(Maybe I'm wrong.)I hear ya, but if he doesn’t have his mechanics down at this point, that’s a problem.
I don't think it's a big deal that HS QBs need work on their footwork and mechanics. I would assume most do. Again, I'm not saying my explanation IS what's going on. It just looks to me like he's overtly focused on that in the video (and the drills with the coach mocking up a rusher to avoid while still moving his feet in that Manning style) seem to support that, and that could explain the inaccuracies and lack of fluidity.
And hey, Sefo never got his footwork right. He always struggled throwing to his left; he couldn't get his feet pointed in that direction smoothly and usually ended up locking out his left knee (as I recall). Sefo got us the best season we'd had in decades, so fundamentals are not entirely dispositive of results. Sure, I'd always prefer smooth and athletic, but BLew is pretty smooth and athletic in his throwing style and that--clearly--did not lead to much success. I'm hopeful it will in the future, of course.