Lingard = Rasul
Outrunning people just isn't enough. You still gotta be a RB. Chaney has the edge there for sure. Not worried about him long term but if i had to choose one of the RB's to be 4th in rotation early it'd be him.
Chaney i think will have an early learning curve adjusting from limited reps in the Wing T to the spread. Pass protect worries though should be limited in this scheme.