I like Blue's talent but you never know what will and won't translate to the pros. I liked Deuce's explosiveness coming out also and it hasn't translated at all (yes, his size is a hindrance but we saw Sproles make it work. The most damning thing about Deuce is he doesn't look explosive at all even though he did in college).
I think Vaughns explosiveness was overrated. He looks much faster than he is because of his tiny body. But the truth is he is a 4.56 guy in a tiny body. I think you can be small and really fast. You can be big and run a 4.56. But if you're both small and run kind of slow it's a concern.
And let's face it Deuce isn't just small, he is comically small. 5'5" 179 pounds is below any sort of minimum standards one could come up with. At that size he would have to be a massive outlier at RB. It was a roll of the dice on basically something you've never seen work in the modern NFL.
I'll agree with you on Blue to this extent though. I really don't question his ability to run. He isn't just fast, he might be the fastest RB in this draft class. Size wise he isn't big but he is in that Gibbs type size range. My concern with Blue is the fumbles and that is 100 percent a legitimate concern. If you can't hold on to the football as a RB you almost might as well not exist. Because what you do for the offense can be completely wiped out by a fumble here or there. You're going to get some INTs in a game, what you can't afford is additional turnovers by a guy touching the ball 15 times in the game. Just not acceptable. I'd sacrifice big plays from my RB any day if it meant I didn't have to hold my breath for a turnover every time the guy touches the ball.
I do think fumbles are correctable with RBs. But it's a killer bad quality to have if you can't fix it.
My real hope is that we built this O-line and brought in the right coaches so that even guys like Mafah and Jevonte Williams can be really good players. I think they are capable RBs that can be productive with the right situation around them. Which is sort of how I've always viewed RB. You just can't have a massive turd like Zeke was last year filling that spot.