I agree there were some good things and he did get better and better throughout this preseason, but too many mental mistakes and as you and others have said, he really needs reps and he won't be getting them anymore. It's what happens when you draft a kid who barely played in FCS who's mentally not ahead of the curve. He would have needed to come along slowly and get monster reps to be ready to play by year 3, but instead..... Frankly, he should have stayed in school, but can't really criticize the decision, he went top 5. But in reality, he needed more reps at the collegiate level. Also injuries early his his career really hurt him. If Dallas really wants to develop him, then tonight was sort of good. Enough positives to build on but enough obvious mental mistakes and accuracy issues which means he won't get a big offer from another team. I do wonder what his upside is? Really good backup? Bottom 1/3 starter? Maybe top 20 starter? He doesn't look like he'll ever be as good as Dak, but he is only 24. I don't know, tough decision probably dictated by what happens with Dak and others.
I think most will look to what RB could they have gotten right around where Dallas could have picked. So this probably means guys like Bucky Irving, Ray Davis, Braelon Allen, Audric Estime, or even Jaylen Wright. Any of those guys pop, and all have looked good early, and the decision will be criticized fairly heavily, fair or not.
Has he? He'll be the 3rd QB. Rush will be the guy who will fill in for Dak if he's out 3-4 weeks. If Dak misses the season for some reason and it goes south pretty quickly, I could see Lance getting the 2nd half of the season to himself to get real reps. He's definitely not a RB or run with those type of skills. Yes, he's fast but he's not ultra elusive and he's not the guy who will lower his shoulder like Allen or a Taysom Hill, who is much much larger. I don't think Lance is a better runner than most of our outside weapons. Maybe a trick play or something, but definitely not a consistent part of the sweep game.
The biggest takeaway with Lance is replacing Dak, if he chooses to move on, could be really really hard and maybe a multi-year challenge. Dak may prove Jerrah's last chance at a deep playoff run before he dies, and he's chosen to fuck around and go cheap.... Sort of shows where is priorities are. He'll talk the game of being "all in", but he's totally full of shit.