I thought he looked real good in limited time.
Maybe it was just fresh legs, but he took it in when BJGE got stuffed on the previous play. That could earn him Belichec points....
This is just my opinion, but I think that run may have the opposite effect.
Vereen appeared to have a small hole where the run was designed to go. He didn't hit that hole, rather he danced, and cut it back against the grain. Because KC was all bunched up inside, that worked, and he got the corner and the end zone, but in a normal situation, there would likely have been outside contain on the weak side to prevent that from happening. BB seems to be the kind of coach who wants his players to run the plays, as they are called (as does Brady), so "improvising" like Vereen did would likely (IMO) be frowned on.