What makes Legette intriguing is he's one of those who might be a better pro than he was in college. If and when he puts things together he's potentially a beast of a player. Dude can get up for it, he's an explosive athlete, would be a threat anywhere he catches it.
But I do agree he has to fit on the mental side with the Rams. They're known to be one of the tougher offenses, they run a shit ton of motions and use the wideouts heavily in the run game. So they aren't going to want a one-trick pony who can just run nines. Gotta be cerebral enough to grasp the playbook quickly as a rook in order to translate early on.