He can run his Dad's offense just fine. Its the offense he has run since he was a kid and Deion was the playcaller every step of the way.
The story with Daboll...many would point to whatever happened after...but I focus on the point that he couldn't remember the install or didn't prepare for the install or just didn't know. Anything after is usually theatrics to blur the point that he didn't know.
The other story that Albert Breer mentioned in the article with another team that had one of his INTs lined up...my attention goes straight to the point that he couldn't identify what went wrong.
He also didn't do any of the rudimentary fun stuff pre-draft like the Gruden Camp show that lets these QBs show off that side of themselves.
You would point to the lack of humility, and that is totally understandable. That lack of humility isn't Pick 144, that's a guy that is seen as a backup by league.
Couple that with the story of Colorado demoting and letting go of a very respected offensive playcaller that left a head coaching gig (and got a head coaching gig immediately after he was let go) in the middle of the season.
One of my quarterback scouting notes that I always refer back to came from a story where Tajh Boyd recalled why he didn't make it in the NFL as a backup and he outlined some pretty good reasons for it and its always stuck with me. In the NFL, as a backup, if you are the kind of learner where you need reps in the offense to really learn the offense (which Tajh Boyd says he was), you won't make it. Those backup QBs need to be booksmart and able to learn the offense without the reps (because they don't really get much) and when called upon you need to be able to run a rudimentary version of the offense without many reps - think of why Josh Dobbs has had a career for long in the NFL. The kind of "drop" we saw with Shedeur only happens when there is information we don't know or there is some sort of crime. What information don't we know about him? Probably a lot, but in this case, my hypothesis is he just doesn't know ball at the level he needs to and some of these vague reports of what happened in this meeting absolutely showcase the lack of humility, but also showcase that this guy might not know his ****. Both are probably true, but I don't think the lack of humility alone gets him to 144.
The lack of humility lessened his options, but those teams that were an option did not think he could play, even as a backup. By the time he was taken by Cleveland, they just saw him as a lotto ticket. The other teams took QBs or waited until Shedeur was gone to take theirs (like Pittsburgh).
With that said, this guy summarizes my overall point I was making during the draft about him. That is the information we didn't know.
I said this at the start of Day 3.
Did Sanders really bomb those interviews as bad as it has been reported?
Probably can't draw up a play. The social media and nepo baby behavior is one thing, but he's probably deficient between the ears as a quarterback at this stage. Only reason I could see him dropping like this. Players get drafted earlier - even quarterbacks - with far more red flags and real personality flaws.
He looks like a good quarterback, to me. He played really well in college.
He doesn't have any injury issues that we know of.
Got to be a between the ears football thing.
Why don't more so call experts bring this up? Sheduer has only played for his dad. What kind of player is he really? Obviously Deion put his sons in the best possible situation to be successful. Deion was his sons pop warner coach, their high school coach, and probably ran basic plays, than became a college coach and had to find an OC who could run a more pro style system. 
