you guys should know more than me, but does Geno always have enough time to bake a cake? with little big man and steady running wild how could you not look good on that team. I will say he does have finesse.
He had more time early in the season than he did in later games
As far as mobility/athleticism, Smith's not really an RG3 type. He can run some, but if I were a DC I wouldn't be sweating much about it.
From what I've seen though, he is somewhat "pocket mobile". Pocket awareness might need some work though, but that's why you have coaches. They coach him up right, I think he'll do pretty well.
(obviously it won't be with us, but I like to think he'll be successful whatever team he goes to)